Ola and Kacper were siblings who really enjoyed playing together. One rainy afternoon they were playing hide and seek in their room. Suddenly, Kacper noticed that something was shining behind a large, old wardrobe in the corner of the room. He summoned Ola and together they moved the wardrobe, revealing a small blue door with a carved playful cat. The door was so unusual that the children were stunned. - Do you think we can open it? - whispered Ola. Kacper shrugged his shoulders, but you could see curiosity in his eyes. Ola gently touched the handle. The door creaked open and... A flashing, coloured light appeared behind them, as if someone had scattered millions of coloured confetti inside. On the other side of the door was something they had both never seen before: spinning steps, trees hanging in the air and balloons floating in the air. Ola looked at Kacper - they felt like going through the portal, but.... Suddenly, from behind the door, they heard a soft voice calling out: "Help! Is someone there?"