The morning light did not penetrate the basement. Here, four floors beneath the Warsaw pavement, time was measured not by the movement of the sun but by the quiet hum of the ventilation system and the cyclic flicker of the fluorescent tube above workstation number four. Marta Solak stared at the monitor. Her eyes burned as though someone had sprinkled fine sand beneath her eyelids, but she did not blink. She was afraid that if she closed her eyes even for a second, the graph would disappear. Or, worse, transform into something she would not be able to name.
A frequency spectrum. A green line undulating against a black background. Mountains and valleys of sound.
She pressed the spacebar. The sound struck her headphones. It was not loud, but it had a physical density, as though someone were pouring warm oil into her ears.
"...cold. It is very cold here, sir."
She stopped the recording. Rewound. Spacebar.
"...cold. It is very cold here, sir."
The voice was a child's. High-pitched, breaking, with that particular nasal intonation she remembered from her own recordings on cassette tapes, when she had recited poems for her grandmother. But this was not a recitation. In this voice there was raw, naked resignation. Fear that had already congealed and become part of the landscape.
Marta removed her headphones. They hung around her neck, heavy as a collar. She drew her hand across her face, feeling the cold of her own skin beneath her fingers. She took a sip of coffee. It was cold, thick with grounds, and tasted like metal. It suited the place perfectly.
The spectral analysis software did not lie. Algorithms had no imagination, did not have nightmares, and had no concept of paranoia. To the computer there existed only zeros and ones, amplitude and frequency.
Background noise: 50 Hz. The characteristic hum of the electrical grid from the nineteen-eighties — unstable, dirty. That checked out.
Medium: Stilon reel tape, type AN-25. The magnetic signature indicated iron oxide degradation typical of thirty-year-old material. No digital artefacts. No traces of editing. No splices. The sound was continuous.
Marta stared at the screen, searching for an error. There had to be one. Because this was impossible. In 1986 she had been three years old. In 1986 she had been playing with plastic building blocks in her grandmother's living room while the evening news played on television. In 1986 she had not said "sir" with that intonation. With that adult, weary precision concealed within a child's timbre.
She reached for the mouse. Her hand did not tremble. That would have been banal. Her hand was rigid, as though the joints had turned to stone. She clicked on the biometric voice analysis tab. Modern software, the kind the archive used to identify speakers on old recordings of Party officials. Expensive. Precise. Merciless.
Two graphs appeared on the screen. One red — the sample from the tape. One blue — a sample of her own voice, which she had recorded an hour earlier on a dictaphone, reading the same passage.
She overlaid them.
The lines matched in ninety-nine percent. The remainder was the difference of age, the development of the vocal cords, lung capacity. But the individual characteristics — the micro-vibrations, the way she placed her dental consonants — it was the same fingerprint. Only smaller.
Marta pushed back from the desk. The chair scraped across the concrete floor; the sound in the empty basement rang out like a gunshot. She stood up. She had to stand, because sitting had suddenly become intolerable. She felt her rationalism — that hard shell she had built over years of study and work — cracking. Not with a crash. It cracked quietly, like glass under too much pressure.
It is an error. It must be an error.
She walked to the shelving unit. Metal racks stretched into infinity, disappearing into the darkness beyond the reach of the fluorescent lights. Thousands of boxes. Millions of hours of recordings. The past catalogued, labeled, sealed in cardboard coffins. She had always liked that. She had liked knowing that what had passed was dead and safe. That it could not bite her.
Now she had the feeling that the boxes were breathing.
She returned to the desk. She removed the tape from the reel-to-reel player. Carefully, in cotton gloves. The tape was physical. A brown, matte ribbon. You could touch it, smell it. It smelled of vinegar and old dust. How could something so mundane carry such dread?
She placed the reel in its box. She did not label it. For the first time in her life she did not affix a reference sticker. She slid the box into her bag, between her sandwich and the spare batteries for her headphones. Her heart was beating against her ribs in a slow, heavy rhythm. One. Two. One. Two.
Theft. Removing archival materials. Article 278 of the Criminal Code, plus the internal regulations, point four, sub-point a.
"I'm not stealing," she whispered to the empty room. Her voice was hoarse. "I'm securing evidence."
The door at the far end of the hall opened. Marta flinched, instinctively shielding her bag with her body. Stanisław Walczak walked in. As always, he looked as though he had been cut from a catalogue of civil-service fashion from the nineteen-nineties and pasted into the present. A grey jacket, an immaculately ironed shirt straining across his stomach, a face devoid of expression.
He walked slowly, placing his steps with that infuriating bureaucratic self-assurance. His shoes clapped softly against the concrete.
"Ms. Marta," he said. His voice was soft, without edges, and for that reason all the more unpleasant. "It is eight thirty. The login system indicates that you did not leave the building yesterday."
Marta forced a smile. She felt the muscles of her face resist, as though they were made of wood.
"I have a great deal of work, Director. Digitizing the Z-80 series. The deadlines are pressing."
Walczak stopped two meters from her. He did not cross the invisible boundary of her personal space, but his gaze did. It swept the desk, the monitor — fortunately in sleep mode — and then came to rest on her face. He had eyes the color of floor-washing water.
"Diligence is a virtue, Ms. Marta. But health and safety regulations are sacred. An exhausted worker makes mistakes. And in our profession, a mistake means... the loss of history."
He smiled. The smile did not reach his eyes.
"Besides," he continued, adjusting his cuff, "I received word from the central office. They were asking about the C series. The one from the hospital in Górowo."
Marta felt a cold knot tighten in her stomach. She tried to breathe shallowly, so as not to betray her tension.
"Oh?" she asked. That single word cost her more energy than it should have.
"Yes. Apparently someone logged into the index database last night. Searching for patient names. Mr. Henryk Czajka. Ms. Halina Mróz."
Walczak let the silence hang. He waited. The quiet between them thickened, filling with unspoken accusations.
"I was checking the consistency of the metadata," she lied. The lie came out smoothly, too smoothly. It surprised her. She had once despised lying, considered it a logical error. Now it was a tool for survival.
Walczak nodded. Slowly, like the pendulum of an old clock.
"I understand. Please bear in mind, however, that the C series is subject to a restricted access clause due to sensitive data. The Mental Health Protection Act. The families are still alive. We do not want... disturbances. Do we?"
He took a step back. He was retreating, but Marta sensed it was not over. This had been a warning. Gentle, courteous, wrapped in the cotton wool of bureaucracy — but beneath it was steel.
"Please go home, Ms. Marta. Get some sleep. You look... indistinct."
He turned and left. Marta watched his back, his slightly stooped shoulders. She waited for the door to close. Only then did she release the breath she had been holding in her lungs. The room swam around her.
He knew. He did not know what, but he knew that she was digging where she should not be. And he was afraid. Walczak was never afraid — he only calculated risk. If he was intervening now, it meant the risk had exceeded acceptable thresholds.
She grabbed her bag. The strap cut into her shoulder. She had to leave. It was suffocating. The basement walls, which had always given her a sense of security, now seemed to be closing in. Every shadow between the racks might be concealing something. Every murmur of the ventilation system might be a whisper.
She ran out of the basement, passing the security guard at the turnstile without a word. She needed air. She needed noise. She needed something to drown out the voice of the little girl in her head.
The cafeteria on the second floor was bright, loud, and smelled of reheated pizza. Katarzyna Bednarek sat at a table by the window, painting her nails a vivid neon pink. The polish reeked of chemicals, cutting through the smell of food. Kasia was humming something under her breath, nodding her head in time with music that trickled from the large, colorful headphones hanging around her neck.
When Marta sat down across from her, Kasia did not even look up.
"I'm telling you, he's insane," she said, blowing on the wet nail of her thumb. "He took the coffee machine. You understand? He left me a cat that craps in the flower pots, and he took the coffee machine. That is the definition of sociopathy."
Marta placed her hands on the table. They were cold and damp. The tabletop was sticky with spilled juice.
"I need your help, Kasia."
The tone of her voice made Kasia finally look at her. Her face, usually animated and laughing, stiffened for a fraction of a second. In Marta's eyes was something that did not belong to a sunny morning.
"Oh God," said Kasia, screwing the cap back onto the nail polish bottle. "You look like shit, sorry for the honesty. Another all-nighter in the dungeons?"
"I need access to the paper files. The ones from the eighties. Before the digital system was introduced."
Kasia raised her eyebrows. Her red fringe fell across one eye; she blew it away with practiced ease.
"But you have higher clearance than me. You're the queen of the dungeons."
"Walczak is blocking me. He's monitoring my logins. If I go into the main storeroom, he'll know."
Kasia leaned across the table. Sparks of interest lit up in her eyes. For her, this was a game. A spy intrigue in the dull world of archival work. An escape from her empty flat and the absent coffee machine.
"Walczak? That old fart? What's he got to hide? Dodgy invoices for printer toner?"
"I don't know," Marta lowered her voice, glancing around the room. At the next table, two interns were laughing at something on a phone. No one was looking at them. "It concerns the hospital in Górowo. Ward C."
"Ooh, a psychiatric unit," Kasia bared her teeth. "Spooky. I like it. What have you got there? A serial killer? A ghost?"
Marta hesitated. She wanted to tell the truth. She wanted to say: I have myself. I have my own voice from thirty years ago, saying things I don't remember. But the words stuck in her throat. They sounded too absurd. Too unhinged. Kasia would laugh at her, or, worse, begin to worry about her in that pitying way Marta could not stand.
"A journalistic investigation," she said instead. "I'm helping a friend. The one from the paper I told you about."
"The good-looking one? Wiśnicki?" Kasia grew even more animated. "Well, well, well. Still waters run deep. A date in the archive — very your style. The romance of dust and dust mites."
Marta clenched her teeth. She did not correct her.
"Are you going to help me or not? You're on duty in Storage A at noon."
Kasia sighed theatrically, examining her nails.
"Fine. What do I need to find?"
Marta pulled a crumpled piece of paper from her pocket.
"The handover protocol from the closure of the ward in 1991. And the staff list. Specifically one name: Edmund Rawski."
Kasia took the paper between two fingers, careful of the fresh polish.
"Rawski. Sounds like the name of a Bond villain. Right, consider it done. But you owe me wine. And not that cheap piss from last time."
She tucked the paper into the pocket of her colorful cardigan.
"Seriously though, Marta..." Kasia's tone shifted. It became slightly more sober, though still light. "Is everything alright? Your hands are shaking."
Marta hid her hands beneath the table. She clenched them into fists so tightly that her nails dug into her palms.
"Too much coffee," she said. "It's just caffeine."
Kasia studied her for a moment, then shrugged. Her attention span was as short as a music video.
"If you say so. Listen, that Wiśnicki — is he with anyone? Because you know, if you're only helping with the investigation..."
Marta stopped listening. The sound in her head had returned. A quiet, rhythmic hiss of tape, laid beneath Kasia's chatter. She could see the movement of her friend's lips, could see the neon pink of her nails, but all she felt was the cold radiating from the bag in her lap. The tape was in there. An artefact. Proof that the world was not as she had believed it to be.
"I have to go," she said suddenly, standing up. The chair toppled over with a crash.
Several people turned to look. Kasia froze with her mouth open.
"Hey, easy! What's wrong with you?"
"Sorry. I feel unwell. Send me the scans to my personal email. Not the work one. My personal one."
She turned and walked toward the exit, almost at a run. She had to get out of this building. She had to find Tomasz. He had that box of his father's things. Maybe there... maybe there was an answer.
As she passed reception, she had the impression that the security guard was watching her strangely. Not the way you look at an employee. The way you look at a patient who has escaped from the ward.
She stepped out onto the street. The sun struck her face, sharp and merciless. Warsaw roared with car horns and the conversations of passers-by. The normal world. Buses, pigeons, people in suits. Everything looked exactly as it had yesterday, but Marta knew it was a façade. A thin coat of paint applied over rotting wood.
She reached for her phone. She dialed Tomasz's number. Ringing. One. Two. Three.
"Pick up," she whispered, feeling panic rising in her throat like stomach acid. "Please, pick up."
"Hello?" Tomasz's voice was hoarse, sleepy. And irritated.
"It's me," said Marta. "We need to meet. Now."
"Solak? It's nine in the morning. I only just fell asleep."
"I checked the tape," she said, ignoring his protest. She was standing in the middle of the pavement; people swerved around her, casting resentful glances. "It's real, Tomasz. It's not a fake. And..." she hesitated. Swallowing hurt. "And Walczak knows. Someone is watching the files."
Silence fell on the other end. There was only the rustle of bedding and the click of a lighter. Tomasz was lighting a cigarette, even though he had supposedly quit.
"Come over," he said shortly. "Door code is 1984. Fitting, isn't it."
He hung up.
Marta put her phone away. She set off toward the tram stop. Every step was an effort. She felt as though she were walking underwater. Or through a thick fog in which shapes lurked that she would rather not see.
In her bag, in its plastic box, the tape waited. Patiently. It had time. It had thirty years of time.
Tram number 22 arrived with a squeal of wheels on rails. The sound reminded Marta of a scream. She got on and took a seat by the window. She pressed her forehead against the cold glass.
Closing her eyes, she saw the graph again. A green line. Mountains and valleys.
The frequency of fear.