The wind was streaking the windows of the old school and the night was spilling between the trees of the park when Lena - a thirteen-year-old with curly hair and a perpetually dreamy gaze - stayed after class to clean her classroom. As she picked up a sheet of paper from the floor, something under her bench caught her eye. Hidden there was a book - heavy, leather-bound, with a lock rusted as if it had been lurking there for centuries. On the cover in silver letters shone the inscription: "Book of Lost Spells". Lena, though she hesitated for a moment, reached for the book. She opened it, and an unexpected chill swept through the classroom. The letters on the first page began to vibrate gently, as if they were drawing her in with their eyes. A quiet rustling sounded not far from the door - was someone else in the school? A boy from the parallel class, Maks, stood in the half-shade and looked at her puzzled. "What have you got?" - he asked in a whisper. Before she had time to answer, a light of a colour so unusual that neither of them could name it flowed from the book. "It's... magic?" - muttered Lena, and Maks just nodded, as if everything suddenly made sense. The book turned a few pages on its own, as if it wanted to show something, and the light shimmered harder. Letters and characters hovered in the air, forming a spell whose meaning none of them knew. At the same moment, the classroom door creaked open - someone or something was trying to get inside. At that moment, the light of the book embraced them both, and Lena felt the reality around her begin to blur. Would she dare to speak the spell? What price will they have to pay for the mystery they have uncovered?