Barbara Winiarska

Janek and Wanda live in a small room in a villa, while other rooms are occupied by offices of various institutions. Janek often stays at work after hours, just to avoid returning to the cramped apartment too early. One day, a man named Malinowski, who once lived in the same small room, visits the couple. He proposes to exchange their room for a new, two-room apartment that he has just received. Janek and Wanda are initially distrustful, but eventually, the exchange takes place. It turns out that Wanda's ex-husband, Jerzy, already lives in the new apartment. Despite the divorce, as he is registered with Wanda, he has the right to continue living in her apartment. Janek tries to find a way to get rid of the intruder.

Kajetan, a dog and famous detective, and his assistant, Cat Makawity, try to solve the mystery of the director's disappearance and the problems of other creatures from the neighbourhood. Only the Secret of Marabou’s Code can stop Chameleon, a dangerous criminal.

En route to London, Bear discovers at the border checkpoint that his passport is missing a few pages, which may prevent him from traveling to the city with the sports team he manages.