One stormy afternoon, Tosiek and Lena hid between the bookcases in the school library, escaping from an impatient teacher and the ever-present noise. The smell of old books mingled with that of the rain, and all sounds seemed to fade into the semi-darkness. - Quiet! - Lena grabbed Tośek by the sleeve. - Did you hear that? Something clattered loudly on the wall behind the topmost bookcase. Tosiek swallowed his saliva, but curiosity overcame fear. Together they slipped between the shelves until they stood in front of an old, dusty wardrobe they had never seen here before. - Do you think someone left a jacket here? - whispered Tosiek. - This looks... like a wardrobe from a fairy tale! - Lena smiled sassily and grabbed the handle. The door opened with a groan, revealing an interior full of thick coats and coils of cords. Behind the tangle, however, was something strange - a silvery mist that shimmered in the darkness. - Can you see it? - Lena asked, and Tosiek nodded. The mist swirled and shifted as if it were alive. Drawn in by curiosity, the children went inside. For a moment they walked among the heavy cloaks until suddenly their feet trembled under their feet, the air grew cold and the distant sound of bells reached their ears. As Lena pushed back the last coat, a completely different world unfolded before their eyes. Giant trees had leaves like colourful umbrellas, and among them swirled bright, glowing points like swarms of skylights. In the distance, bridges floated in the air leading to huts suspended high in the treetops. Only that the ground beneath their feet seemed suddenly to be as if .... moving. Suddenly, large green eyes peeked out from under the leaves. There was a rustling sound somewhere to their left, and a tiny blue paw waved at them from behind a trunk. Tosiek and Lena held their breath as something began to approach from the nearby shade....