Findus hops around on his new mattress day and night, but the annoyed Pettersson wants to have some rest. The solution: Findus' own play and jumping house, which Pettson is building for him right next door! But the tomcat enjoys being independent and living alone so much that he not only moves to play, but also to the little house. But that's not how Pettersson imagined it! Does he have to lead his life now without his happy little companion? Findus has to come up with something to cheer up old Pettersson again.