Love, jealousy, sweet revenge and a big inheritance – the comedy "Divorce for the advanced" is a clear case for the family court judge. Iris Wiedemann has had enough! Her husband Jörg has been cheating on her with the younger, attractive Andy for a long time. Until now, she had tolerated it all – for the sake of the kids. But when Jörg gives his wife a ride-on mower for her birthday and hides some sparkling jewellery for his lover in his suitcase, sparks fly at the Wiedemanns. After 20 years of marriage, Iris files for divorce. A fatal mistake: At the opening of late Aunt Helga's will, where only Iris is present, it turns out that Iris and Jörg will be inheriting a lot of money - on condition that their marriage remains intact.