Rolf Köster has been working as a cashier in a small bank branch for years. Every day passes like the day before. He has a thirteen-year-old daughter who would rather write in a diary than speak and a six-year-old son who has to wear a bicycle helmet because he is constantly banging his head against walls. His wife organizes the whole family life, and Rolf stays in the background. But he has doubts as to whether he, who has "everything", is really happy. Then Rolf is unexpectedly given a week's vacation. He decides not to tell his family and to leave the house as usual. Rolf Köster begins to lead a double life.