The school always had a sort of strange smell in the late afternoon, when most of the students had long since left and Sarah and David were searching the nooks and crannies of the empty library. On this day, their attention was drawn to a book that had fallen off a shelf right next to the door leading to the attic. - 'Did you see that? - whispered Sara, looking at David with a mixture of surprise and excitement. When they picked up the volume, it turned out to be an old notebook, all covered with pencil-drawn drawings. Some of them looked like mere scribbles, but others depicted strange landscapes: a city suspended in the clouds, a door leading nowhere and silhouettes of faceless figures. On the fourth page was a drawing of something that resembled the gymnasium of their school - but with a huge open hole in the floor, and bright lights and floating particles coming out of it, as if gravity had stopped working here. Sara blinked. - This ... looks very similar to our hall. Even the same benches. But what are those lights? David, despite being a typical sceptic, felt the hairs on the back of his neck stand up. - Maybe someone had found something here at some point? Maybe in the attic? They couldn't contain their curiosity. Creeping on tiptoe, they moved towards the door leading to the dusty attic, notebook in hand. Each step up the stairs creaked louder than the last. The light of day was fading behind them, and the darkness seemed to thicken before them. As they swung open the heavy door, they noticed something flickering in the depths of the loft. Sara squeezed her notebook tighter. David took a step forward, feeling his heartbeat quicken. It was quiet for a moment and then, unexpectedly, they heard whispers. Silent, barely audible words came from somewhere beneath the floor.... Then Sara noticed a section of the floor exactly like the one in the drawing. And just then a strange, unnatural light flashed....