Mona and Egil have grown up with a jumble of parents and stepparents. Now they have a total of three pairs of parents. Mona gets pregnant, and all her parents want her to get married. During the engagement party, the parents cheat on each other one by one, which leads to Mona escaping with her fiancé. They decide not to get married. The parents travel to Copenhagen to look for the escaped young people.
The title of this film "En herre med bart" translates as "A Gentleman with a mustache." It is the the story of a married couple, a hardworking lawyer and his wife. The wife is fed up with the marriage and wants a divorce, something the husband won't let her have.