Night poured a silvery glow over the streets of the old town, mixing it with the mist that drifted lazily between the cobbled alleys. At the very end of the Avenue of Lost Steps, where the lantern lights were fading, rose the Whispering Tower - gothic, entwined in centuries-old ivy, with windows resembling the eyes of the sleep-watching inhabitants. Veronica, Marek and Lena had long heard of this tower. Each of them knew their grandparents' stories - about the sounds that come from the bottom of the staircase at night, about the lights that jangle from the ceiling, about the spells hidden in the walls. But on this night, the three friends decided to cross the threshold of a tower that had been shunned by all. - Are you sure? - Lena asked as they stood under the heavy door, covered with runes and gouges resembling intertwined snakes. She was shivering, though she wasn't sure if it was from cold or excitement. - If not now, when? - answered Marek, clutching in his hand an old key found in his great-grandfather's attic. Veronica looked at them with a smile - she was always the bravest one. The door opened with a deafening creak. Inside, the air was heavy with dust and something else - something they couldn't name. With each step, their shadows danced across the walls and the clatter of their shoes echoed. From the walls, portraits of past wizards and mages looked down on them. At the end of the long corridor, stairway after stairway lit up with an old blue glow, as if the tower itself was inviting them into the depths. They ascended the stairs, guiding each other. Upstairs, in the main chamber, something unusual awaited them - a huge mirror standing among circles drawn in chalk. It shone with a magical radiance, absorbing their every thought. As Marek took a step forward, the light in the mirror changed colour, and a silhouette began to emerge from behind the surface, as if someone was trying to get into their world from that side. The friends froze, feeling that they had just crossed a boundary from behind which there was no return....