On the corner of Cicha Street and Grabe Alley stood the city's old library. The place, permeated with the smell of dust and old books, had been abandoned for years. It was said that strange lights could sometimes be seen there at night, although no one admitted to having the courage to check what was causing them. Patrick, Lena and their best friend Kuba had just turned eighteen. That night, as part of an unusual celebration, they decided to find out what lurks behind the library doors that have been closed for a decade. Armed with torches, notepads and unwavering confidence, they set off just after midnight. Getting inside was not difficult - the board in the window had long since rotted away and all they had to do was lift it slightly. Inside, they were greeted by silence and moonlight streaks illuminating the dusty bookcases. Each step echoed off the walls and the mark of their shoes was left imprinted in a thick layer of dust. Strolling between the shelves, Lena was the first to notice something disturbing. On one of the tables lay an open book and next to it, a modern pen. 'Who was here before us? - she whispered. Patrick bent down to read the title of the book, but the words seemed to blur in the semi-darkness. Cuba, meanwhile, wandered towards the door leading to the back room, from which a soft light shone. Carefully, keeping close together, they approached this door together. The light emanated through a narrow crack; it looked warm, pulsing, although there was no electricity in the building after all. Patrick put his hand on the door handle and looked questioningly at his friends. Lena nodded, and Cuba held his breath. When the door swung open creakingly, their eyes saw an interior completely different from the rest of the library. Mysterious patterns shimmered on the walls, and in the centre stood the silhouette of a man, his back turned. The little heroes froze, not knowing whether they should come closer, run away, or perhaps ask who the stranger was. A tension hung in the air that made their hearts beat faster.