On a school trip to an old print shop, Emil and Lena uncover a hidden staircase, a room full of strange envelopes, and a mystery that has been waiting for a century.
The rain had been falling since morning, turning June into something cold and grey. Emil slouched in the last row of seats, pretending to listen while Mrs Wozniak talked about the town's history. Lena sat beside him, notebook open, trying to copy down dates and names that already felt like they belonged to another century.
The class 2b stared out at the slick windows and the empty street beyond them, all except Emil, whose sharp eyes kept moving as if he were already looking for the one detail everyone else had missed. When the bus finally stopped on JagielloĊska Street, the old print shop rose in front of them, narrow and dark, with cracked stone above the door and fogged-up windows that seemed to hide more than they revealed.
Inside, the air smelled of dust, metal, and damp paper. Mr Alfred, the caretaker, greeted them with a thin smile and steel-coloured eyes that missed nothing. While the others drifted between the rusted presses and leaning shelves, Lena realised Emil was no longer beside her. She found him behind a heavy curtain near the back wall, standing in front of an old wardrobe no one seemed to have noticed.
Without a word, he pointed to a narrow slot in the wood. Something was jammed inside it - a key, blackened with age. Lena looked at him once, then at the wardrobe. Together they turned it.
The hinges groaned. Dust fell in a soft cloud. Behind the wardrobe, hidden in the wall, a narrow staircase led down into darkness.
They should have gone back for the class. Instead, Emil grinned and Lena felt her pulse jump as they stepped onto the first stair. The air grew colder with every step, the light from above thinning behind them until only the sound of their shoes remained. At the bottom, they found a cramped room lined with bookcases and stacked boxes.
But it was not the books that stopped them.
Hundreds of envelopes lay there, bound in bundles, each one yellowed with age and sealed with wax. Most were blank. One, lying on top of the others, had only three letters written across it in faded ink: DLK.
Lena reached for it.
A pale flash cut through the room. Emil froze. From somewhere behind the shelves came a quiet voice, close enough to raise the hairs on Lena's neck.
"What are you looking for here?"