The alarm clock rang with a force that Igor did not even try to ignore. It was Thursday, and the June sun had already been heating up the atmosphere in the block of flats in Zaspa since morning. The high school was exceptionally empty today - many students had disappeared, preparing for their final exams, but Igor, Lena and Wojtek met as usual at the tram stop. On the surface, they had nothing in common. Igor was an amateur programmer, Lena trained martial arts and Wojtek played in a band and loved philosophical discussions. That day, however, he was feeling strange - for days he had been dreaming things that later came true. Lena discovered that she could sense other people's emotions with one touch, and Wojtek.... Wojtek sometimes heard quiet whispers in places where no one should be. As they walked through the corridor of the old wing of the school that morning, they passed a locked archive door. The key to it, lay oddly twisted in the lock. Lena felt a sudden sense of unease, Igor's ears buzzed, and Wojtek, as if on cue, heard an unpleasant rasp in his head. - Something is wrong here," Lena whispered. Igor looked at her questioningly, but Lena was already reaching for the door handle. The door creaked open, and behind it appeared a corridor they had never known: dark, full of old, cracked tiles from which a strange light shone. In the distance, a silhouette shimmered - a shadow, as it were, of a boy their age who knew their names. Before they could speak, the light went out and they suddenly felt all their senses sharpen. At that moment, they heard a door slam shut behind them and realised they were no longer in their school. Igor saw a digital sign on the wall: 'ONE OF YOU IS NOT COMING BACK'. There was a deafening, dragging sound at the end of the corridor and the boy's shadow disappeared. ...