At her new school, Lena finds a strange leather-bound diary and stumbles into a teacher’s secret experiment that may be changing the whole school from within.
The first bell of September was already loud enough to make Lena flinch. At her new school, though, the sound felt wrong from the start, as if it had bounced off the walls and come back altered. She paused in the entrance hall, gripping her backpack strap tighter. The building smelled of wet polish, chalk dust, and something metallic she could not place.
Students streamed past her in loose, noisy groups, and Lena suddenly felt very visible. She scanned the corridor signs, looking for room 107, pretending not to notice the glances from older kids who seemed to know exactly where they were going and exactly who did not belong.
Then she spotted Alex by the lockers.
He looked almost unchanged since childhood, except taller, sharper around the edges, with the kind of expression that made it hard to tell whether he was amused or worried. He raised a hand in greeting and fell into step beside her.
"The bell’s been dead for a week," he said quietly. "The teachers call everyone in themselves now. Like we’re in primary school."
Lena gave him a side glance. "That’s supposed to make me feel better?"
"It shouldn’t."
They turned into a brighter corridor lined with club posters, timetable notices, and neat rows of student work pinned under plastic. Room 107 was at the far end. Through the half-open door, Lena saw a maths classroom washed in pale morning light. The desks were already filled, but it was the object on the teacher’s table that caught her attention.
A huge green journal lay there, worn at the corners, its leather cover cracked with age. It looked too old, too heavy, and too deliberate to have been forgotten. Lena stared at it a second too long.
Alex noticed. So did the teacher.
Mrs Olszewska stood at the board with a marker in her hand, but her eyes flicked toward the journal every few seconds, as if she expected it to move.
The lesson began. Equations appeared on the board. Chairs scraped. Pens clicked. Lena tried to focus, but every few minutes her gaze slid back to the journal. Once, when the room was quiet except for the rustle of pages, she heard Mrs Olszewska murmur to herself, almost under her breath: "Watch the diary."
Alex looked at her sharply.
When the teacher left to speak to the secretary, the room seemed to change. The air thinned. Lena could feel the journal on the desk like a dare.
"Don’t," Alex mouthed, but he was too late.
Lena pushed back her chair and crossed the classroom with the paper in her hand, as if she had a normal reason to be there. Up close, the diary was heavier than it had looked. She opened it.
Names filled the first pages. Dates. Marks. Attendance notes. Then the writing changed. There were symbols in the margins, coloured charts, columns of numbers, and entries that did not read like school records at all. They looked like observations. Results. Trial runs.
Lena’s throat tightened as she turned another page.
Something about the layout felt familiar in the worst possible way, as if the school itself had been quietly measured and sorted into this book. She was still reading when the classroom door slid open without a sound.
Mr Czarnecki stood in the doorway.
He did not say anything. His gaze moved from Lena to the open diary and stayed there, cold and unreadable. Behind Lena, the room had gone completely still. Even Alex did not breathe.
Then Mr Czarnecki took one step inside, and Lena realised the diary had not been left out by accident.