Lena starts her first class in 1B today. She sits by the window, next to her classmate Olek. In the classroom there is a globe and a quiet aquarium. The blackboard is green and the clock is ticking loudly. Mrs Hania hands out the new timetable. Lena holds a pencil case and a shiny pencil. The first bell sounds and the children fall silent. Suddenly a quiet buzzing is heard from the pencil case. Lena opens it and finds a folded piece of paper. On it is a drawing of an arrow and three words. It reads: "After lesson to the library, look for the red book". Lena whispers to Olek: "What is this?". Olek shrugs his shoulders, but his eyes sparkle. They glance at the clock; there are five minutes left until break. The library door creaks, although no one touches it. A red book slides off the shelf and flashes its cover. Lena catches her breath and takes a step towards the door. Then something shiny falls out of the book.