The phone fell onto the metal table with a thud as Dr. Federico finished screaming. His breathing was heavy and ragged, as if the air in the morgue had become too thick for his lungs.

Cristina remained motionless in front of the stretcher.

The two twins were there. Exactly as before.

Small. Still. Bathed in the white light that fell from the ceiling.

But something had changed.

She knew it.

Federico too.

The doctor approached again with slow steps, as if each movement could awaken something he preferred to leave dormant.

“Maybe…” he murmured, trying to maintain logic, “…maybe it was a muscle reflex.”

But her voice didn’t sound convinced.

He placed his hand on the child’s chest again.

Wait.

One second.

Two.

Three.

Nothing.

Federico frowned.

“See?” he said, trying to regain control. “The human body can exhibit involuntary movements after death. Especially in children. The nervous system is still—”

Then it happened.

A blow.

Gentle.

But of course.

A heartbeat.

Directly under his palm.

Federico withdrew his hand as if it had been burned.

-My God…

Cristina felt a chill run down her spine.

—Did you feel it too?

The doctor did not respond.

He touched his chest again.

This time he pressed more carefully.

And there it was.

Another heartbeat.

Weak.

Irregular.

But impossible to deny.

Federico turned towards Cristina with a completely pale face.

“If there’s a heartbeat…” she whispered, “then… they’re not dead.”

The words seemed to bounce off the walls of the mortuary.

Cristina looked at the twins.

—But… they were declared dead at the hospital.

Federico did not respond immediately.

He leaned towards the child’s face.

He brought his ear close to her lips.

Wait.

A whisper.

So faint it barely existed.

Breathing.

Frederick stepped back as if the world had just bent beneath his feet.

—Cristina! Bring the monitor here now!

She ran to the corner of the lab, grabbed the laptop, and stumbled back.

With trembling hands they placed the sensors.

For a few seconds, only silence could be heard.

Then…

A sound.

Beep.

A faint heartbeat appeared on the screen.

Cristina felt tears welling up in her eyes.

—They’re alive…

Federico turned towards the second twin.

He repeated the process.

Beep.

Another heartbeat.

Weaker.

But present.

The doctor closed his eyes for a moment.

“If you hadn’t heard those laughs…” she whispered.

Cristina looked at him, confused.

-Doctor…

Federico took a deep breath.

—The autopsy would have started in less than twenty minutes.

Cristina felt the ground disappear beneath her feet.

Autopsy.

In living children.

The mortuary door burst open.

Two police officers ran in.

—What’s going on here?

Federico looked at them.

—We need an ambulance now. These children are not dead.

The officers were frozen in place.

—What did you say?

—THEY’RE ALIVE!

The ambulance arrived five minutes later.

The paramedics entered with a stretcher and medical equipment.

When they connected their own monitors, their faces reflected the same shock.

—Weak pulse… but present.

—Extremely low pressure.

—Severe hypothermia.

One of them looked at the doctor.

—Who declared the death?

Federico did not respond.

Because the question was already echoing inside her head.

Hours later, at the hospital, the twins were connected to machines that were fighting to keep them alive.

Cristina watched through the glass of the intensive care unit.

Federico appeared beside him.

—The police have already spoken with the hospital that issued the death certificate.

-AND?

The doctor sighed.

—They say the children arrived with no detectable pulse. Extremely low body temperature. Dilated pupils.

Cristina murmured:

—Deep hypothermia…

Federico nodded.

-Exact.

The body can reduce its vital functions to levels that are almost impossible to detect.

Cristina looked at the little ones.

—So… they were never dead.

Federico slowly denied it.

-No.

Silence returned between them.

After a moment Cristina asked:

-Doctor…

-Yeah?

—And the laughter?

Federico took a while to respond.

Because that was the only part that science couldn’t explain.

That night, as she walked home, Cristina couldn’t stop thinking about it.

In the mortuary.

In the silence.

In the childish laughter he had heard.

Two days later, he returned to the hospital.

The twins had survived.

They were still weak.

But alive.

Cristina carefully entered the room.

The children were awake.

One of them looked at her.

And she smiled.

A small smile.

Innocent.

—Hello doctor —she said in a soft voice.

Cristina felt a lump in her throat.

-Hello…

The boy looked at his brother.

Then he looked at her again.

Did you hear us laughing?

Cristina’s heart stopped for a second.

-That?

The boy responded completely naturally.

—When we were asleep… my brother said something very funny.

Cristina felt a chill run down her spine.

—Asleep?

The little boy nodded.

—Yes. Everything was dark… but we could hear things.

Cristina looked at Federico, who was behind her.

The doctor was also completely pale.

“And… why were they laughing?” she asked carefully.

The boy shrugged.

—Because my brother said the doctors thought we were dead.

Then she let out a small laugh.

The same laugh.

Exactly the same.

Cristina felt tears running down her cheeks.

Because at that moment she understood something she would never forget in her life.

Sometimes…

The difference between life and death is not in the machines.

Not even in the diagnoses.

Not even among doctors.

Sometimes…

It’s just a little laugh… that someone had the courage to hear.