The sharp thud of Valeria’s body against the cold tiles of the hallway sounded like a death sentence.

It wasn’t a minor fainting spell, the kind you see in soap operas. It was a complete collapse, the fall of a body that had simply reached its limit. The sound of her head bouncing lightly against the granite floor echoed above the bustle of the more than three hundred students changing classes in Building B of the high school.

Dr. Elena, who was filling out tedious health reports in her small, peeling-walled office, looked up abruptly. Her medical instincts, honed over fifteen years of working in Mexico City’s public schools, warned her that the noise wasn’t normal. It wasn’t a backpack falling, or someone tripping while playing. It was the sound of dead weight.

She ran out into the corridor, pushing her way through a sea of ​​navy blue uniforms and knitted sweaters.

“Make some space! Everyone back, give her some air!” Elena shouted, desperately but carefully pushing the teenagers who had already formed a morbid circle around the young woman’s body.

In the center of the circle, lying face up with her eyes half-closed and her lips dangerously pale, was Valeria. She was seventeen, but her fragile build made her look fourteen. She was one of the scholarship students in the morning shift, a bright but quiet girl, one of those who sit in the back row and seem to apologize for breathing.

Elena threw herself to her knees beside her. The floor was freezing. She placed two fingers on the girl’s neck, searching for a pulse. It was weak. Too weak, and erratic.

“Valeria, my love, listen to me. I’m Dr. Elena, can you hear me? Squeeze my hand,” the doctor asked, trying to remain calm while her heart raced.

But Valeria didn’t respond. Her breathing was shallow, almost a thread, and a cold, sticky sweat covered her forehead. Elena noticed something strange immediately: despite being unconscious, the teenager’s right hand was gripping her left arm with inhuman strength, as if she were protecting something beneath the thick sweater of her uniform.

Suddenly, the click-clack of expensive heels broke the tension in the hallway. The crowd of students parted like the Red Sea to let Principal Quiroga through.

Margarita Quiroga was a fifty-year-old woman with impeccable hair, bright red lipstick, and a complete lack of empathy. She had been running the school for five years, and her sole obsession was maintaining the school’s prestige, avoiding scandals, and keeping the SEP inspectors happy. For her, the students weren’t troubled teenagers; they were numbers, averages, and potential headaches.

“What’s all this commotion? Everyone back to your classrooms immediately!” barked the headmistress, clapping her hands loudly. “Young people, this isn’t a show! Back to class!”

The director looked down at Valeria, and instead of concern, her face contorted into a grimace of obvious annoyance.

“For God’s sake, Valeria, get up already,” Quiroga said, crossing his arms. “This is the third time this month you’ve made a scene before the final exams. I’m not going to excuse you from math, no matter how much you act.”

Elena looked up, incredulous. Her blood boiled.

“Headmistress, she’s not faking,” the doctor replied, raising her voice to be heard over the murmurs of the students who refused to leave. “Her pulse is thready; she’s in shock. I need someone to call an ambulance.”

“An ambulance? Please, Elena!” Quiroga scoffed, rolling his eyes. “I know this girl and her family perfectly well. They’re from up there, from the neighborhood in the ravine. Always making excuses not to do their jobs, always asking for extensions. She’s just lazy and wants attention.”

The director bent down slightly, bringing her face closer to that of the unconscious girl.

—Valeria, I’m giving you three seconds to open your eyes and stand up, or I swear I’ll sign your expulsion papers today. I’m taking away your scholarship, do you hear me? One…

“Shut up, Margarita!” Elena burst out, completely forgetting about hierarchies and professional respect.

The entire hallway fell into a deathly silence. No one had ever raised their voice to Principal Quiroga. Doña Meche, the cleaning lady who was watching from the corner with a broom in her hand, discreetly crossed herself.

Quiroga stood up straight, red with fury.

“How dare you speak to me like that in my school, in front of my students? You’re fired, Elena. Pack your things. And you, girl, get up right now because…”

The director couldn’t finish her sentence. Valeria began to convulse slightly. A fine but constant tremor ran through her legs, and a muffled moan of pain escaped her pale lips.

Elena knew time was running out. She checked the girl’s pupils; they were reacting slowly. Something was very wrong. She had to check her vital signs completely, take her blood pressure, look for signs of a severe allergic reaction, a sting, or signs of poisoning.

 

He tried to roll up the sleeve of her left sweater to place the blood pressure monitor on it, but the fabric was strangely stiff around her forearm. Furthermore, Valeria’s hand, still in her semi-conscious state, refused to let go of her arm.

Elena gently pushed the girl’s fingers away. When she succeeded, she felt that the sweater fabric was damp. And sticky.

A metallic and sweet smell, the unmistakable smell of infection and despair, reached the doctor’s nose.

“Damn it,” Elena whispered. She couldn’t roll up her sleeve. It was stuck to something underneath.

“What are you doing?” demanded the principal, taking another step closer, threateningly. “Don’t touch her! I’ve already called the cleaning staff to pick her up and take her out of my hallway! She’s making a mess of the floor!”

 

Elena didn’t hear her. She reached into the pocket of her white coat and pulled out a pair of trauma scissors, the kind with rounded tips designed for cutting clothing in medical emergencies.

“You wouldn’t dare!” Quiroga shouted, seeing the metal gleam under the fluorescent lights. “That uniform belongs to the school! You’re going to make her pay for the new sweater, Elena, I swear!”

Elena ignored the threats from the woman in front of her. She stared at Valeria’s sweat-drenched face. The girl moved her lips in an almost imperceptible murmur. Elena leaned closer to listen.

“No… not my little brother…” the teenager whispered in her feverish delirium.

The doctor felt a knot in her stomach. With a firm, precise movement, she hooked the lower blade of the scissors into the cuff of the navy blue sweater and cut sharply upward, tearing through the thick fabric and the white blouse she wore underneath.

The sound of the fabric tearing echoed in the absolute silence of the hallway.

The sleeve fell to the sides.

What was revealed made Dr. Elena drop the scissors to the floor with a metallic clatter.

Director Quiroga, who was standing a meter away with her mouth open, ready to scream again, froze. The color drained from her face in a second, replaced by a deathly pallor.

The students in the front rows, those who were recording with their cell phones looking for a viral video for their social networks, slowly lowered their hands.

A collective, stifled scream echoed through the building. Then, a crushing silence.

 

As if synchronized by pure terror and the shock of what their eyes refused to process, the principal, the students, and even the teachers who had peeked out… took a step back. The entire hallway receded, leaving Elena and Valeria alone in the center of that circle of horror.

The girl’s arm was not a student’s arm.

From his wrist to his elbow, he was tightly wrapped in silver industrial tape and dingy rags that had once been white, now stained a dark, yellowish brown. But that wasn’t the worst of it.

Where the tape had come loose, the bare skin revealed a massive, black bruise that seemed to cover the arm down to the bone. And on that dead, damaged skin, dozens, perhaps hundreds, of small puncture marks surrounded by inflamed, infected tissue. Marks from thick needles. Marks from extractions.

But the teenager wasn’t an addict. Dr. Elena knew how to recognize the signs of substance abuse. This was something else. This was systematic. These were blood and plasma extractions, performed brutally, constantly, and clandestinely.

And stuck to her skin, held in place by the same industrial tape that was cutting off the girl’s circulation, was a crumpled piece of paper, written in shaky handwriting with a blue pen.

Elena, her hands trembling violently and tears blurring her vision, leaned closer to read what the note attached to the teenager’s mangled arm said.

The words written there would change everyone’s life at that school forever. And they would uncover such a dark truth in the city streets that no one would ever sleep peacefully again.

Elena looked up at Director Quiroga, who was now trembling, covering her mouth with her hands, on the verge of vomiting.

 

“Do you still think he’s faking it, Margarita?” Elena asked, her voice breaking with tears and fury.

The director couldn’t answer. She simply fell to her knees.

The silence in the high school hallway was so thick you could almost cut it with the same scissors that Dr. Elena had just dropped on the floor.

The students, who just minutes before had been recording amid laughter and jeers, now had their phones down. Some covered their mouths; others wept silently. No one could tear their gaze away from that mangled arm, wrapped in duct tape and dirty rags, marked by the purest cruelty.

But it was the small piece of graph paper, stuck to Valeria’s purple skin, that made Elena’s blood run cold.

With her fingers trembling uncontrollably, the doctor peeled off the note. The paper was damp with the teenager’s cold sweat and stained with a yellowish liquid that smelled of infection.

The handwriting was shaky, hastily written with a blue ink pen that barely left a mark. It was the message of someone who knew their body was about to give out.

“If I don’t wake up, there are 800 pesos in the small pocket of my backpack. Please, someone give them to my mom. They’re for Toñito’s machine. Mr. Genaro, I’ve already paid you with my blood all week, please don’t hurt my family.”

Elena read the words over and over again. Her brain refused to process the magnitude of the horror.

Valeria wasn’t sick. She didn’t have anemia from malnutrition. They were draining her. They were squeezing her dry, drop by drop, for money.

“Call an ambulance! Now!” Elena’s shout tore through the deathly silence, filled with a despair that echoed off the walls of the building.

Suddenly, Director Quiroga, who was still kneeling on the floor, let out a muffled groan.

Elena turned to look at her. The impeccably dressed woman, in a tailored suit and red lipstick, was as white as a sheet. Her eyes were wide, fixed on the note Elena was holding. But it wasn’t just surprise on the director’s face.

It was terror. A deep and personal terror.

“Genaro?” Quiroga whispered, his voice barely a trembling thread. “No… it can’t be at my school… he said he’d only…”

 

Elena frowned. Adrenaline throbbed in her temples.

“Do you know about this, Margarita?” the doctor asked, getting closer to the director’s face. “Do you know who did this to this girl?”

Before Quiroga could utter a single word, the deafening wail of sirens could be heard in the distance, rapidly approaching down the main avenue. Someone, finally, had had the sense to call 911.

“Move aside,” Elena spat out in disgust, pushing the headmistress away to refocus on Valeria, whose chest barely moved.

Within minutes, chaos erupted at the school. Paramedics rushed in with an orange stretcher, shouting their way through the students.

When the lead paramedic, a burly man with a weary look, saw Valeria’s arm, he stopped dead in his tracks. He’d seen it all on the streets of Mexico City: accidents, assaults, overdoses. But the systematic torture inflicted on the body of a high school student left him breathless.

“Doctor, what is this?” she asked, as she quickly placed an oxygen mask on the teenager.

“They’re using her as a human blood bank, and her body couldn’t take it anymore,” Elena replied, climbing into the ambulance next to the stretcher. “I’m coming with you. Her blood pressure is plummeting.”

The ambulance doors slammed shut, leaving behind a school in a state of panic and a headmistress who could barely stand, supported by two teachers who looked at her suspiciously.

The journey to the General Hospital was a nightmare of red lights and sudden braking.

Inside the ambulance, the heart monitor beeped with an erratic and alarming rhythm. Elena held Valeria’s good hand, quietly pleading with her not to give up.

As she looked at the girl’s pale face and sunken dark circles, Elena felt an old, sharp pain in her chest.

Ten years ago, Elena had lost her own younger sister. Kidney disease, a collapsed public health system, and the lack of money to pay for private clinics had taken away what she loved most. That’s why she had decided to become a doctor in public schools, to detect early on the children the system overlooked.

But she hadn’t seen Valeria. The teenager had hidden behind baggy sweaters and excuses of tiredness, carrying alone a burden no adult should have to bear. Guilt was eating Elena up inside.

“I’m not going to let you go, Valeria. I swear on my life,” he whispered in her ear, brushing a strand of sweaty hair away from her forehead.

Upon arriving at the emergency room, a medical team was already waiting for them. They transferred her to the trauma bay in seconds.

Dr. Ramirez, head of the emergency room and an old friend of Elena’s, began cutting open the rest of the uniform to look for other injuries. What they found left them all in a paralyzing silence.

It wasn’t just the left arm.

On the inner thighs, hidden beneath her school skirt, were more marks. Dark punctures, greenish and yellowish bruises. Valeria hadn’t just been donating blood. They had been extracting plasma, perhaps even bone marrow, in completely unsanitary conditions.

“Elena…” murmured Dr. Ramirez, taking off his glasses and running his hands over his face. “This isn’t the work of an amateur. This is organized crime. There are clandestine clinics in the outskirts that buy blood for private hospitals that don’t ask questions. This girl has been having blood drained for months.”

“Can you save her?” Elena asked, feeling like she couldn’t breathe.

“Elena’s hemoglobin level is incompatible with life. I don’t know how she managed to walk to school today. We need to give her a blood transfusion immediately, administer broad-spectrum antibiotics, and pray that she doesn’t suffer multiple organ failure.”

While the doctors struggled to stabilize the teenager, Elena went out into the waiting room. The fluorescent lights flickered, giving the place an even more gloomy appearance.

There sat Doña Carmen, Valeria’s mother.

She had come running from the diner where she worked as a kitchen helper. Her apron was covered in oil stains, and her hands, rough and cracked from washing dishes, trembled as they clutched an old canvas bag.

When she saw Dr. Elena, Carmen jumped to her feet.

“Doctor… they told me at school that my daughter fainted. Is she okay? Did her blood sugar drop? I’ve already told her not to leave without breakfast, but since we give everything to the boy…” The woman spoke quickly, trying to convince herself that it wasn’t anything serious.

Elena felt her heart break into a thousand pieces. She took Doña Carmen by the shoulders and made her sit down again.

—Mrs. Carmen… Valeria is very ill.

The woman’s nervous smile vanished. Her eyes instantly filled with tears.

—What’s wrong with my little girl? Tell me the truth, doctor.

Elena swallowed the lump in her throat.

—Ma’am, who is Mr. Genaro?

Upon hearing that name, Doña Carmen let out a bloodcurdling scream that made everyone in the waiting room turn to look at her. She covered her face with her hands, and her body began to rock back and forth in a pure panic attack.

“No! Oh my God, no!” the woman sobbed, almost unable to breathe. “That man is a loan shark in the neighborhood. A year ago, when my Toñito’s kidneys failed and Social Security told us there was no room for his dialysis, I asked him for a loan.”

Carmen looked up, her eyes bloodshot with terror.

“It was fifty thousand pesos, doctor. Just fifty thousand to pay for the first machines so my child wouldn’t drown in his own fluids. But the interest went up… it went up so much that I couldn’t pay anymore. Genaro said that… that if we didn’t pay him, he would take our lives. That my Toñito wouldn’t live to see his next birthday.”

The revelation hit Elena like a bucket of ice water.

—But Valeria… she’s only seventeen —Elena murmured, suddenly understanding the magnitude of the sacrifice.

“Valeria told me she got a job after school. Cleaning houses in the Santa Fe area. She brought me money every week. She said her boss gave her bonuses for coming in early…” Carmen grabbed her hair, pulling at it desperately. “I believed her! I was so blinded by caring for Toñito that I didn’t see my own daughter! What did that monster do to her, Doctor? What did he do to my little girl?”

Elena hugged her tightly, letting the mother weep onto her white coat. The rage Elena felt now was greater than the pain. A ruthless loan shark had forced a teenage girl to sell her blood, her health, and her life in clandestine clinics to save her younger brother.

And worst of all: the school principal, Margarita Quiroga, knew that man.

Several kilometers away, at the empty high school, Principal Quiroga was locked in her office with the blinds down.

Her hands trembled as she unlocked the bottom drawer of her mahogany desk. Inside, beneath a stack of student file folders, lay a thick yellow envelope.

He opened it and spilled its contents onto the desk. Bundles of five-hundred-peso bills fell with a thud.

It was Genaro’s money.

Six months ago, the man had approached her with a “beneficial” proposal for the school. He offered her a generous “monthly donation” in exchange for allowing a white van without license plates to park a couple of blocks from the main entrance at dismissal time.

“They’re just blood tests for a private study, director. The boys who want to participate will receive financial assistance. You win, they win. Everyone’s happy,” Genaro had told her, with that smile that didn’t reach his cold eyes.

Quiroga, blinded by greed and her credit card debt, had agreed. She convinced herself it wasn’t a bad thing. That the poor students in the neighborhood needed the money and that a picket line wouldn’t hurt anyone.

But never, not even in her worst nightmares, did she imagine that Genaro was hijacking the lives of his students. That he was blackmailing girls like Valeria, forcing them into that van again and again until it was empty.

And now, with Dr. Elena snooping around and the police about to get involved, the director’s glass empire was about to shatter.

Quiroga’s cell phone vibrated on the desk.

He looked at the screen. It was an unknown number.

He swallowed and answered, bringing the device to his ear with a trembling hand.

“Hello?” he whispered.

On the other end, a hoarse, raspy voice made her sweat cold.

—I heard there was a little scene at your school today, Margarita. That one of my “donors” threw a tantrum and ended up in the hospital.

“Genaro…” the headmistress’s voice broke. “The girl was dying! The school doctor cut her uniform in front of everyone—there are witnesses, there are photos! This is over. I don’t want your money, and I don’t want you anywhere near…!”

“Shut up, bitch,” the voice interrupted, cold as ice. “You’re just as much in this as I am. If I go down, you go down with me. So you’re going to the hospital, you’re going to talk to that meddling doctor, and you’re going to make sure that girl’s family doesn’t say a word. Otherwise, the next time I come to visit, it won’t be to drop off an envelope.”

The call was cut off.

Margarita Quiroga dropped her phone to the floor. She was trapped in a web of blood and extortion, and she knew that Genaro didn’t make empty threats.

Back at the hospital, the emergency room doors burst open.

Dr. Ramirez ran out, looking around for Elena. He was pale.

—Elena, come quickly!

The doctor left Carmen with a nurse and ran towards the trauma room.

Upon entering, he saw Valeria awake. She was connected to three IV lines, her face covered by an oxygen mask, but her eyes were wide open, filled with a primal, animalistic terror.

The monitors were beeping frantically because the teenager was trying to pull the cables off with her only good hand.

“Calm down, my love, calm down, you’re in the hospital!” Elena shouted, holding her by the shoulders so she wouldn’t hurt herself. “You’re safe now, no one’s going to hurt you!”

Valeria, crying uncontrollably and coughing violently, swatted off her oxygen mask. She looked at Elena with a desperation that broke the doctor’s heart.

“Doctor…” Valeria sobbed, her voice breaking and rasping. “Doctor, you don’t understand… today is Tuesday.”

—Yes, beautiful, it’s Tuesday. Don’t worry about school, I’ll take care of everything. Your mom is already here.

Valeria shook her head violently, clinging to Elena’s robe with her nails and teeth.

“It’s not school!” the girl cried, the effort causing a trickle of blood to escape from the corner of her mouth. “Today was Tuesday… if I didn’t go to the truck today… they told me that…”

Valeria choked on her own tears. The terror in her eyes wasn’t for herself.

“They told me that if I didn’t go today to deliver the kidney… they were going to go to the clinic and disconnect my little brother’s machine. They’re going to kill Toñito, doctor! They’re coming for him!”

Elena’s world came to a complete standstill.

Valeria’s monitor began to emit a long, continuous beep. The little girl’s heart, overwhelmed by terror and lack of blood, had just collapsed.

CHAPTER 3
The long, high-pitched beep of the heart monitor felt like a nail being driven straight into Dr. Elena’s brain.

“Code blue! Shock room one, now!” shouted Dr. Ramirez, as he practically climbed onto the stretcher to begin CPR maneuvers.

Elena froze for a second, watching Valeria’s fragile body twitch with each chest compression. The girl’s bones, weakened by months of deprivation of nutrients and blood, creaked under the force needed to keep her alive.

“Charge at two hundred!” Ramírez ordered. “Everyone out!”

Valeria’s body jerked across the white sheet as the electric shock coursed through her. Nothing. The monitor continued to display that green line, straight and cruel, symbolizing the end of everything.

“Again! Charge at three hundred!” roared Ramirez, sweat running down his forehead.

Elena reacted. She couldn’t stand there watching life slip away from the little girl who had given everything for her family. She approached the bedside, holding the oxygen mask, and pumped pressurized air into those exhausted lungs.

“Don’t you dare, Valeria!” Elena shouted, tears blurring her vision. “Don’t you dare leave me alone with this mess! Your brother needs you, your mother needs you! Fight, damn it, fight!”

On the third attempt, just as Dr. Ramirez was about to declare the time of death, a small jump appeared on the screen. Then another. And another. A faint, but constant rhythm.

“We have a pulse,” Ramírez whispered, collapsing against the wall, exhausted. “She’s back, but Elena… her heart won’t withstand another episode like this. She’s hanging by a thread.”

Elena nodded, wiping her tears with the sleeve of her gown. She looked at Valeria’s face, now intubated, and remembered her last words. “Today is Tuesday… they’re going to disconnect Toñito.”

The doctor stormed out of the trauma room. In the waiting room, Doña Carmen was on her knees, praying to a small image of Our Lady of Guadalupe she wore on a scapular. When she saw Elena, she stood up with a stifled gasp.

—My little girl? How is my little girl?

“She’s alive, Carmen, but we have a much bigger problem,” Elena said, taking her hands. “Valeria told me that today was the day she had to hand something over… a kidney, Carmen. That damned Genaro wasn’t just taking her blood, he wanted her organs. And she said that if she didn’t do it today, they’d go after Toñito at the clinic.”

Carmen’s face contorted with pure horror.

“The ‘San Judas’ clinic!” the woman cried. “It’s a small private clinic in the Doctores neighborhood. That’s where he gets dialysis because Genaro has an agreement there… My God, my boy is there all alone! He said it was his afternoon shift today!”

Elena didn’t think twice. She took out her car keys.

—Let’s go. Right now.

As Elena sped through Mexico City’s hellish traffic, her phone kept ringing. It was Director Quiroga.

Elena answered via hands-free, throwing an insult into the air while dodging a minibus.

“What do you want, Margarita?” Elena spat. “I hope you’re preparing your resignation, because as soon as I get out of this, I’m going to sink you.”

“Elena, please listen to me!” The director’s voice was hysterical; she sounded like she was crying. “Genaro called me! He knows Valeria’s in the hospital! He said if the police find out, he’s going to tie up loose ends… Elena, he knows where my family lives! He forced me to give him the address of the clinic where Valeria’s brother is. I didn’t want to, I swear, but he put a gun to my head…”

Elena braked suddenly at a red light, making the tires squeal.

“What did he just say?” Elena roared. “Did he give Toñito’s address to that butcher?”

“He forced me, Elena! He’s already sent his people there! They’re going to take the child to force Valeria or Carmen to sign whatever… or to make an example of them. Elena, please, don’t say I told you!”

Elena slammed the phone down. Her rage had reached a level she never thought possible. Director Quiroga wasn’t just corrupt, she was a coward who had just signed the death warrant of a sick child.

“What’s wrong, doctor? Why did you get like that?” Carmen asked, trembling in the passenger seat.

—Hold on tight, Carmen. We have to get there before them.

Elena accelerated, turning down a side street the wrong way, ignoring the honking horns and the shouts of the pedestrians. The general hospital was far from Doctores, and every minute that passed was a drop of life slipping away from Toñito.

The “San Judas” clinic was a gray, three-story building with reinforced windows and a facade that pretended to be professional but smelled of cheap medicine and dampness.

When Elena and Carmen arrived, screeching tires in front of the entrance, they saw a white SUV with tinted windows double-parked. It was the same SUV the high school students had described.

“It’s Genaro’s car,” Carmen whispered, paralyzed by fear. “Doctor, don’t go in… that man is the devil.”

“Stay in the car and call the police, Carmen. Don’t stop calling until they answer,” Elena ordered, getting out of the car with icy determination.

Elena entered the clinic. The interior was cramped, with a pungent smell of chloroform. There was no one at reception, only a radio playing a cheerful cumbia that contrasted macabrely with the tense atmosphere.

She walked down the main corridor until she heard voices in the distance, in the dialysis room.

—I don’t care if the treatment isn’t finished, just unplug it now—said a hoarse voice, the same one Elena had heard on the director’s phone. —The sister turned out to be defective, so the package was changed. This kid still has some usable parts.

Elena pushed open the swinging doors of the room.

What she saw made her shudder. Toñito, a boy of barely ten years old, with a sunken face and arms covered in marks, was connected to a dialysis machine that hummed monotonously. His eyes were wide open, filled with tears, while a tall man, with a scar across his cheek and wearing a cheap suit, carelessly disconnected the tubes.

Two other armed men stood guard at the door beside him. The man in the suit was Genaro.

“Let go of that child!” Elena shouted, advancing with a determined stride.

Genaro turned around slowly, with a mocking smile.

—Look at you, the heroic doctor. Margarita told me you were stubborn, but I didn’t think you were this stubborn. What are you doing here, doctor? Giving us an ethics lesson?

“I’m here to tell you the police are on their way,” Elena lied, holding her phone up. “And we already have the photos of what you did to Valeria. The whole school hallway witnessed it. You’re trapped, Genaro.”

Genaro let out a dry laugh and approached Elena. She didn’t back down an inch, even though she could smell the tobacco and alcohol emanating from him.

“Witnesses? Some kids with cell phones?” Genaro stroked her cheek with a cold finger; Elena slapped it away. “Those videos disappear, memory cards can be bought, and doctors like you… well, doctors have accidents in this city every day.”

Genaro signaled to his men. One of them grabbed Toñito by the shoulders, ripping the IV lines out of his arm. The boy let out a scream of pain.

“Leave him alone! He’s so weak, if you move him now he’ll go into shock!” Elena pleaded, losing her composure. “Take my blood, take me, but leave the child alone!”

Genaro stopped and looked her up and down, assessing her as if she were merchandise.

“Your blood is old, doctor. But your kidneys… those must be worth a pretty penny on the black market. Margarita owes me a lot of money because of today’s scandal, and someone has to pay Valeria’s bill.”

At that moment, the sound of police sirens began to be heard around the corner. Genaro cursed under his breath.

“Let’s go! Take the brat with you, he’ll serve as a shield!” he ordered.

—No! —Elena lunged at the man carrying Toñito, digging her nails into his arm.

The man groaned and shoved Elena against one of the dialysis machines. The impact was brutal. Elena felt her ribs crack and the world filled with white sparks. She fell to the floor, breathless, as she watched them take the child toward the back exit.

“Carmen!” Elena managed to shout, with what little strength she had left. “The back exit!”

Outside, Carmen, driven by a maternal instinct that overcame any fear, hadn’t stayed in the car. She had found a metal rod in a trash can and, when she saw the men come out with her son, she pounced on them like a lioness.

It wasn’t a fair fight. It was an outburst of desperation. Carmen pounded on the windshield of the truck, screaming like a madwoman, drawing the attention of all the neighbors on the street.

Genaro, cornered by the sound of sirens that were already a block away and by the crowd that was beginning to appear at the windows, made a desperate decision.

“Let him go and let’s go! We’ve already wasted too much time!” Genaro shouted, getting into the truck.

The men threw Toñito onto the pavement like a bag of garbage and sped off, almost running over Carmen in the process.

Elena staggered out into the street, clutching her injured side. She saw Carmen lying on the ground, sobbing, clutching her son, while police patrols surrounded the area.

Two hours later, the clinic was sealed off with yellow “Crime Scene” tape. Prosecutor’s office agents were going in and out carrying boxes of clandestine medical records.

Elena was sitting in the back of an ambulance while a paramedic bandaged her ribs. Carmen was beside her, holding Toñito’s hand, who was already receiving proper medical attention inside the ambulance.

“We did it, Carmen,” Elena whispered hoarsely. “They’re safe.”

Carmen looked at the doctor with eyes full of infinite gratitude.

—And Valeria, doctor? What’s going to happen to my little girl?

Elena remained silent. She knew the damage to Valeria’s body was extensive. But she also knew something else: Principal Quiroga had been arrested just minutes before at the school, trying to burn documents in her office. And with her confession, everyone would fall: the doctors who operated in the shadows, the transporters, and eventually, Genaro.

But the climax of this story was not yet over.

As Elena looked toward the clinic, she saw a police officer come out carrying an organ transport cooler they had found in the basement. The officer approached the commander and handed him an envelope that was taped to the lid.

The commander read the envelope and his face darkened. He walked toward Elena.

—Doctor, I think this has something to do with it. It was on today’s “order” list.

Elena took the paper. Her heart skipped a beat.

In the list of beneficiaries for the organs that Valeria was going to be forced to “donate” that afternoon, the first name on the list was not that of a rich unknown.

It was the name of the only son of the director Margarita Quiroga, who suffered from chronic kidney failure and had been waiting for a transplant for years.

The betrayal was complete. The headmistress hadn’t just allowed the horror for money; she had allowed it to save her own son at the cost of her students’ lives.

Elena closed her eyes, feeling a deep nausea. Human evil knew no bounds.

“Take Toñito to the General Hospital,” Elena ordered the paramedic, standing up despite the pain. “I have to go to the prosecutor’s office. Tonight, no one in this city will sleep until I know the whole truth.”

But just then, Elena’s phone vibrated. It was a text message from Dr. Ramirez, from the hospital.

“Elena, Valeria woke up. But she’s not asking about her mom or her brother. She says she has to tell you something about what’s ‘under the school.’ She says the high school basement isn’t empty. Run, Elena. This is much bigger than we think.”

Elena gazed at the high school building, which loomed in the distance like a dark giant, shrouded in secrets. The true horror was only just beginning to unfold.

Mexico City breathed with an unusual heaviness that night. The air was thick with a humidity that clung to the skin, and the headlights of police cars painted the high school walls with flashes of blue and red that resembled the beating of a dying heart.

 

Elena got out of her car, her ribs aching, but she didn’t care. Dr. Ramirez’s message burned into her hands. “What’s under the school.” Those words echoed in her mind like a terrifying mantra.

The doctor crossed the police cordon, showing her ID. The officers, exhausted after a day of arrests and chaos, let her through. The building, which during the day had been a hive of laughter and teenage dreams, now stood like a cold, silent concrete mausoleum.

Elena went straight to Building A, where the administration offices were located, and below them, the archives and the maintenance basement. She recalled the students’ constant complaints about a “foul smell” coming from the ventilation grilles on hot days, complaints that Principal Quiroga always dismissed as “dead rats in the pipes.”

“How stupid I was…” Elena whispered as she descended the stairs to the basement. The metallic, industrial disinfectant smell began to seep into her nostrils, the same smell she had felt on Valeria’s arm.

Reaching the top of the stairs, he came to a reinforced steel door that was normally secured with three padlocks. Now, the door was ajar. Someone, in their haste to escape or destroy evidence, had left it open.

Elena pushed the metal blade. The screech was piercing in the silence.

What she saw forced her to cover her mouth to stifle a scream. It wasn’t a maintenance basement. It was a clandestine surgical unit, equipped with technology that even the public hospital where she worked lacked. State-of-the-art operating lights, vital signs monitors, and three gurneys lined up with military precision.

On the walls were whiteboards with students’ names, their blood types, and dates. Elena approached, trembling. She saw Valeria’s name at the top, with a red note that read: “Full drainage scheduled for Tuesday. Left kidney pre-assigned (Priority 1).”

 

But it wasn’t the only name. There were ten others. Boys Elena knew, boys who had dropped out of school “because of family problems” or who “had moved to another city” in the last two years.

On a desk at the back, Elena found a black leather folder. She opened it clumsily. Inside were the medical files of the “clients.” The first page had a photograph of an eighteen-year-old, pale and with a sad look in his eyes. He was the son of the director, Margarita Quiroga.

There was a handwritten note from the headmistress, in that elegant calligraphy she used to sign report cards: “Son, forgive me for what I have to do, but I’m not going to let you go. If the system won’t give you an organ, I’ll give you one from one of these shadows that no one will miss. Your life is worth more than a hundred of them.”

“Damn it!” Elena’s shout echoed through the concrete bunker. “They were your students, Margarita! They were your children!”

 

The doctor felt an unbearable nausea. The principal wasn’t just Genaro’s accomplice; she was the mastermind behind the operation. She selected the most vulnerable students—those without parents, those living in the most remote areas—and handed them over to Genaro to “prepare” them with insurmountable debt.

Suddenly, a noise in the shadows made her jump. A man emerged from behind one of the surgical drapes. He wasn’t a policeman. He was one of Genaro’s “doctors” who had stayed hidden, a man with sunken eyes and hands trembling from withdrawal.

“You shouldn’t have come down here, doctor,” the man said, holding a scalpel in an unsteady hand.

Elena stepped back, searching for something to defend herself with. Her fingers brushed against a small oxygen tank.

“It’s over,” Elena said, trying to keep her voice steady. “The police are upstairs. The headmistress confessed. If you touch me, you’ll be in prison for life.”

 

The man hesitated. The desperation on his face was evident. At that moment, the heavy footsteps of the prosecutor’s agents were heard coming down the stairs. The man dropped the scalpel and fell to his knees, weeping. Elena didn’t stay to watch him. She ran from that place, desperately needing fresh air.

Three days later.

The morning sun streamed gently through the window of room 402 at the General Hospital. The sound of the medical equipment was now a calm, rhythmic murmur, indicating that life went on.

Valeria sat on the bed, propped up by several pillows. Her left arm was bandaged, and although she was still very thin, color had returned to her cheeks. Beside her, Toñito slept soundly, curled up in an armchair. The boy no longer needed the dialysis machine; thanks to Elena’s intervention and media pressure, the healthcare system had found a place for him in an advanced treatment program.

Elena entered the room with a small smile. She was carrying a bag with sweet bread and a coffee.

“How are you feeling today, warrior?” Elena asked, sitting down at the foot of the bed.

Valeria looked at her and, for the first time since they met, gave her a genuine smile. A child’s smile, not a martyr’s.

“My arm hurts a little, doctor, but I feel… light. Like a truck has been lifted off me.”

Elena took his hand.

“You don’t have to carry anything anymore, Valeria. Mr. Genaro is in the North Penitentiary, and Principal Quiroga won’t be getting out of jail for decades. The school has been closed for a thorough investigation.”

Valeria lowered her gaze, her eyes filled with tears.

—Doctor… why did she do that to us? She said she loved us like her own children. In the assemblies, she always said that we were the future of Mexico.

Elena sighed, feeling the weight of the truth.

“Some people confuse love with obsession, Valeria. She loved her son so much that she forgot everyone else is someone’s child too. But what you did… the sacrifice you made for Toñito… that is love. Although you should never have gone through that alone.”

“I was scared,” the teenager whispered. “I was so scared that if I spoke up, they would kill us all. Genaro told me that he owned the street and that the principal owned my future. I felt trapped between two walls.”

Elena hugged her gently.

“There are no more walls, Valeria. Now you have a real future. The University has offered you a full honors scholarship when you recover, and there’s a support fund for your mom and Toñito.”

At that moment, Doña Carmen entered the room. She was no longer wearing the dirty apron from the inn. She was dressed in clean clothes, and her face, though marked by weeks of anguish, radiated a peace that Elena had never seen in her before.

“Dr. Elena… I don’t know how to repay you for everything you did for us,” Carmen said, her voice breaking. “You didn’t just save my daughter, you saved my entire family.”

Elena stood up and took the woman’s hands.

“You don’t owe me anything, Carmen. You reminded me why I decided to become a doctor. You reminded me that medicine isn’t just about medicine and surgery, but about justice.”

Elena left the hospital and walked to her car. She paused for a moment to gaze at the blue sky over Mexico City. She knew the scars of this story would take years to heal. In high school, many students would need therapy for the trauma of knowing what was happening beneath their feet while they studied Geography or History.

But he also knew the silence had been broken. People in the neighborhood no longer looked down when Genaro’s truck drove by. Corruption in the schools was being audited like never before.

Elena got into her car and looked at the stethoscope hanging from the rearview mirror. For a moment, she remembered the sound of Valeria’s body falling in the hallway. That sound that Principal Quiroga called “a scene.”

She started the engine and placed her hand on her bandaged ribs. The pain was still there, but it was a pain that made her feel alive. A pain that reminded her that, sometimes, to save a life, you have to be willing to break everything.

Before leaving, she received one last message on her cell phone. It was a photo sent by one of the nurses. The image showed Valeria and Toñito holding hands, looking out the hospital window toward the horizon, where the sun was beginning to set.

Elena smiled, wiping away a stray tear.

It had been a long road since that fainting spell in high school. But in the end, Valeria’s blood no longer served to pay off debts of death, but to fuel the hope of a new life.

Elena started the car and drove away from the hospital, leaving the horror behind and driving towards the light of a new day that, at last, no longer smelled of fear.

Valeria survived, but she never wore a short-sleeved sweater again, because every mark on her skin reminded her that, in this world, there are those who take your life to save their own.