Once upon a time there was a cardboard box with green peas in it. At first. Then, when they were eaten up, something else came into the box: a little cat, still so small that he had room in one hand. A present for Pettersson. That's how fairy tales begin. And old Pettersson had a feeling as if, on a summer morning, you pull up the roller blind and the warm sunlight streams in. The cat can't talk yet, and he's not wearing any trousers yet - but one day, while reading the newspaper, it's time for him to start: "I want trousers like that, too," says Findus. What a wonderful tomcat Pettersson has got!