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The Diary in Apartment 4B

B1Mystery
The Diary in Apartment 4B

Emma found the notebook under a loose floorboard on her first night in the new apartment. The pages were filled with strange, hurried handwriting. Someone had been very afraid when they wrote these words. And Emma had a terrible feeling that person never really left.

Table of Contents

Part 1: The Notebook Under the Floor

Emma had waited three months to find an affordable apartment in the city. When she finally saw apartment 4B, she signed the contract the same day. The rent was low, and the landlord, Mr. Doyle, seemed friendly enough. He only mentioned once, quickly, that the last tenant had moved out “in a hurry.”

Emma didn’t think much about it. She was too busy unpacking boxes and arranging her small kitchen. On her first night, she noticed a floorboard near the window that felt loose under her feet. Curious, she knelt down and pulled it up.

Underneath, she found a thin notebook wrapped in a plastic bag. The cover was worn, and the handwriting inside looked rushed and uneven, as if the writer had been in a hurry. Emma sat on the floor and began to read.

The first pages were normal. Someone named Lena had written about her job, her friends, and her plans for the summer. But halfway through, the tone changed completely. Lena wrote about footsteps outside her door at night. She wrote about a neighbor who watched her from across the hall. She wrote, “I don’t think I’m safe here anymore.”

Emma felt a cold feeling in her chest. She looked at the date on the last entry. It was from six months ago, right before the previous tenant had supposedly “moved out in a hurry.”

Emma reading Lena's hidden notebook by flashlight in apartment 4B

Emma closed the notebook slowly. Her hands were shaking a little, though she wasn’t sure why. She told herself it was probably nothing, just an old journal from someone with an active imagination. But when she looked up at her own front door, she noticed something she hadn’t seen before. Three deep scratches ran down the wood, close to the lock, like someone had tried to force their way in.

Part 2: The Locked Door

The next morning, Emma decided to ask her landlord about Lena. She wanted a simple explanation, something that would make the strange feeling in her chest disappear. Mr. Doyle’s office was on the first floor, tucked behind the mailboxes.

When she mentioned the name Lena, his friendly expression changed for just a second. It was quick, but Emma noticed it. He recovered fast and said that many tenants had lived in 4B over the years. He couldn’t remember all of their names.

Emma didn’t believe him, but she didn’t push further. Instead, she asked about the door at the end of the hallway, the one with a heavy padlock on it. Mr. Doyle said it led to an old storage room that hadn’t been used in years. He said the key was lost long ago.

That evening, Emma walked past the locked door on her way to the elevator. She paused and pressed her ear against the wood, feeling a little foolish. At first, she heard nothing. Then, faintly, she heard a sound like something being dragged across a floor.

Emma standing nervously outside the locked storage door hearing strange sounds

Her heart began to race. She stepped back quickly and pressed the elevator button again and again, wanting to leave the hallway as fast as possible. As the elevator doors opened, she glanced back one more time. The padlock on the storage door was hanging open, swinging gently, though no one else was in sight.

Part 3: The Neighbor Who Watched

Over the next few days, Emma noticed something she hadn’t paid attention to before. An older woman in apartment 4A always seemed to be standing by her door whenever Emma left or returned. The woman never said much, only nodded and watched Emma with quiet, careful eyes.

One afternoon, Emma finally introduced herself properly. The woman’s name was Mrs. Kowalski, and she had lived in the building for over twenty years. When Emma mentioned the notebook, Mrs. Kowalski’s expression grew serious.

She told Emma that she remembered Lena well. Lena had been kind and always said hello in the hallway. But in her final weeks, she had become anxious and afraid. She stopped leaving her apartment except to go to work. Mrs. Kowalski said she used to hear Lena crying quietly through the thin walls.

“She kept saying someone was watching her,” Mrs. Kowalski whispered. “She said it started after she found something she wasn’t supposed to find.”

Emma’s throat felt tight. She asked what Lena had found, but Mrs. Kowalski shook her head and admitted she didn’t know for certain. She only knew that Lena had gone down to the basement one night to do laundry, and after that night, she was different. Frightened. Careful about every sound.

Mrs Kowalski whispering to Emma about the frightened former tenant Lena

Emma thanked Mrs. Kowalski and walked back to her apartment slowly, her mind full of questions. She thought about the notebook, the scratches on her door, and the sound behind the locked storage room. Everything seemed to lead to one place: the basement. Emma knew, with a nervous but determined feeling, that she needed to go down there herself.

Part 4: The Truth in the Basement

Emma waited until the next evening, when the building felt quiet. She took a flashlight and walked down the narrow stairs to the basement, her footsteps echoing softly on the concrete. Rows of old washing machines lined one wall, and beyond them, a dim hallway led toward a series of storage units.

Emma walking through the dim basement hallway toward the storage units

Her flashlight caught a metal door with a faded number painted on it. Unit 4B. Emma’s hands trembled as she realized every apartment had a matching storage unit down here, forgotten by most tenants. She pushed the door open carefully.

Inside, she found old boxes covered in dust, and among them, a small metal lockbox. Written on top, in the same rushed handwriting from the notebook, were three words: “Proof. Don’t forget.”

Emma opened the box and found photographs and copied documents. They showed that Mr. Doyle had been collecting extra, illegal payments from tenants for years, hiding the money through fake maintenance records. Lena must have discovered this by accident while helping him organize old files.

Suddenly, Emma understood everything. Lena hadn’t been imagining danger. She had found evidence of something real, and it had frightened her enough to hide, and eventually to leave without telling anyone where she went.

Emma sat on the cold basement floor for a long moment, holding the lockbox. She felt a strange mix of fear and relief. Fear, because she now understood the scratches on her door and the footsteps Lena had described. Relief, because the truth wasn’t something impossible or supernatural. It was something she could actually do something about.

The next morning, Emma brought the lockbox to the local housing office, along with the notebook. She explained everything she had found. Within weeks, an investigation began, and Mr. Doyle was no longer the landlord of the building. Emma later learned that Lena had moved to another city, safe and unaware that her old notebook had finally told her story.

Emma stayed in apartment 4B. She kept the floorboard loose, just in case, though she never needed to hide anything there herself. Sometimes, in the quiet of the evening, she thought about Lena and hoped she had found peace somewhere far away, no longer afraid of footsteps in the hallway.

The End

Key Vocabulary

WordMeaningExample
Suspiciousfeeling that something is wrong or someone is not honestThe scratches on the door looked suspicious to Emma.
Landlorda person who owns a building and rents it to other peopleEmma asked her landlord about the empty storage room.
Notebooka small book used for writing notes or thoughtsShe found an old notebook hidden under the floor.
Hesitateto pause because you feel unsure or nervousEmma hesitated before opening the locked door.
Evidencefacts or objects that prove something is trueThe photographs were evidence of the landlord’s crime.
Basementthe floor of a building that is under the groundThe washing machines were kept in the basement.
Anxiousfeeling worried or nervous about somethingLena became anxious after she found the secret documents.
Investigationan official process to find out the truth about somethingThe housing office started an investigation the next week.
Tenanta person who pays rent to live in a buildingEvery tenant in the building had a storage unit.
Reliefa feeling of comfort after worry or fear endsEmma felt relief once she understood the truth.

Continue Reading

If you enjoyed this mystery, try another chilling tale: The Door at 3:03 AM.

Continue with full stories at your level at Fluent Flow English.

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