That night, Mother Elena could not sleep.

The convent had become strangely quiet. Even the old wooden beams seemed to creak more loudly than usual.

Elena sat alone in her office, staring at the records of Sister Grace Holloway.

Three pregnancies.

Three births.

No explanation.

She opened the oldest file and examined it again. Grace had entered the convent when she was nineteen. Since then, she had never left the grounds without supervision. Every sister had sworn that no man had entered the cloister during those years.

Yet Grace had somehow given birth twice.

And now she was pregnant again.

Elena finally made a decision.

Before morning, she would search Grace’s room.

She waited until the other sisters were asleep and quietly walked down the corridor. When she reached Grace’s door, she hesitated.

Then she unlocked it.

At first, nothing seemed unusual.

A small wooden cross hung above the bed. Children’s clothes were neatly folded in a corner. A candle burned beside a statue of the Virgin Mary.

But beneath the bed, Elena noticed a loose floorboard.

Her heart began to pound.

She lifted it.

Underneath was a narrow cavity containing an old metal box.

Elena opened it.

Inside were dozens of yellowed papers, photographs, and medical documents.

Then she saw something that made her blood run cold.

The documents were not Grace’s.

They belonged to another woman.

A woman named Maria Holloway.

Elena turned over the first photograph.

It showed a young woman standing outside the convent more than thirty years earlier.

She looked almost exactly like Grace.

On the back of the photograph were four words:

“My daughter must never know.”

Elena’s hands began to tremble.

Grace wasn’t the first.

She had been born into this mystery.

The following morning, Elena confronted Grace.

“Who is Maria Holloway?”

Grace went completely still.

For several seconds, she said nothing.

Then tears filled her eyes.

“You found the box.”

“Tell me the truth.”

Grace looked toward the chapel.

“My mother was a nun here.”

Elena stared at her.

“Your mother?”

Grace nodded.

“She became pregnant while living here. Everyone believed it was a miracle. But it wasn’t.”

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“Then what was it?”

Grace lowered her voice.

“There was a man.”

Elena felt a chill run through her.

“Who?”

“I never knew his name. My mother refused to tell me. She only said that he was connected to the convent.”

Grace took a breath.

“But before she died, she told me something else.”

“What?”

“She said I would eventually become pregnant the same way she did.”

Elena’s face went pale.

“That’s impossible.”

“I thought so too.”

Grace placed a hand over her stomach.

“But after my first child was born, I found a letter from my mother. It said the pregnancies weren’t accidents. They were part of something that had been happening here for generations.”

Elena remembered the locked archives.

There was one section of the convent’s history that had always been sealed.

She had assumed it contained nothing more than old religious documents.

Now she understood why nobody was allowed to open it.

That evening, Elena found the key.

Inside the hidden archive were records dating back almost a century.

Women.

Pregnancies.

Children.

And beside many of the names was the same symbol.

A small black cross.

Elena realized the truth was far darker than she had imagined.

Someone had been using the convent.

And Grace was not simply a victim.

She was the last surviving link in a secret that someone had spent decades protecting.

Before Elena could read the final document, she heard footsteps behind her.

She turned.

Grace stood in the doorway.

But she wasn’t alone.

An elderly woman stood beside her.

Elena recognized her immediately.

Sister Agnes.

The oldest nun in the convent.

The woman everyone believed had been bedridden for years.

Agnes slowly smiled.

“You shouldn’t have opened that file, Mother.”

Elena stepped backward.

“What have you done to Grace?”

Agnes shook her head.

“We did nothing to her.”

“Then who is the father of her children?”

Agnes looked at Grace.

And Grace began to cry.

“There is no father,” Agnes whispered.

Elena stared at them in confusion.

“What do you mean?”

Agnes pointed toward the final document.

“Read it.”

Elena picked it up.

The page contained a medical report from decades earlier.

Her eyes moved down the page.

Then she stopped.

The pregnancies had been caused by an experimental fertility procedure conducted secretly beneath the convent.

The women had been chosen because they had no families outside the convent.

Their children had been monitored from birth.

But the experiment had gone wrong.

The pregnancies were not occurring naturally.

They were recurring because something had been left inside the women’s bodies.

Something that could reactivate years later.

Grace was the final woman carrying it.

Elena looked at Grace in horror.

“Your last child…”

Grace nodded through her tears.

“Mother, that’s why I came to you.”

Elena looked down at the document.

At the bottom was one final warning:

“If the fourth pregnancy occurs, the carrier must not survive the birth.”

Silence filled the archive.

Elena slowly raised her eyes.

“Why?”

Agnes answered.

“Because the fourth child isn’t like the others.”

Before Elena could ask another question, Grace suddenly collapsed.

Her hands went to her stomach.

She screamed.

The lights went out.

And somewhere beneath the convent, an old machine suddenly began to hum.

Elena realized that the experiment had never truly ended.

Someone had been waiting for Grace’s fourth pregnancy.

And now that it had begun…

they were coming for her.

By midnight, the convent gates were surrounded.

But there was one thing the people outside didn’t know.

Mother Elena had already found the final secret.

The coffin they had prepared wasn’t for Grace.

It was for Sister Agnes.

Because the woman everyone believed had been the protector of the convent had actually been the person responsible for keeping the experiment alive.

And when Elena confronted her, Agnes finally confessed everything.

Grace’s children had been born because the convent had been hiding a biological experiment for generations.

The fourth pregnancy was supposed to produce proof that the procedure could be repeated indefinitely.

But Elena destroyed the records.

She freed Grace.

And before dawn, the convent burned.

Years later, Grace and her children lived far away from the old convent.

The children grew up never knowing what had happened before they were born.

Grace kept only one thing from her former life:

the small wooden cross her mother had given her.

Sometimes, when she looked at it, she remembered Elena’s final words:

“Whatever happened to you was never God’s punishment, Grace. It was man’s mistake.”

And beneath the ashes of the abandoned convent, investigators eventually discovered a hidden room.

Inside was a single empty coffin.

On its lid were four words:

“For the fourth mother.”