Three more years, then she will be 40: Sophie is slowly getting scared. Actually, she should be happy and have everything under control: three growing children, a small catering agency, a large farmhouse and a husband, Hubertus, who is reasonably successful professionally. But somehow life has lost its tension. It will wrinkle like an old apple, worse: like herself.

An invitation to an old childhood friend's 40th birthday throws the Baumgartners' hitherto happy life into disarray and makes them question their previous concept of life. Marie and Markus Baumgartner are a picture-book couple. But everyday working life and two children make it hard for the couple to catch their breath. An invitation to the 40th birthday of Marie's former best friend from school, Heike, including a long weekend, comes at just the right time. Without further ado, the Baumgartners hire Grandpa Walter as a babysitter and travel to Marie's old Bavarian home. The surprise on the spot is huge: Heike has achieved everything the two friends had once dreamed of. The chubby duckling has become a beautiful swan and she is living her dream job as a photographer. She lives in a dream house by the lake with her smart husband Hans.

Fritz, Walter and Andi are caught red-handed in the event of a burglary. But are the three friends in Santa Claus costume really a wanted gang of criminals? Commissioner Bremer is supposed to find that out on Christmas Eve. While her family is already waiting at home, she has to listen to more unusual confessions than she would like. But the interrogation won't go, because your intrigued colleague is just waiting to take over the prestigious case.