The film starts in the fashionable seaside resort on the Baltic, Heringsdorf, where Renate Müller spends a secret weekend away from her husband with her bosom friend Ida Wüst. The husband meanwhile has a flirtation while traveling by night train from Frankfurt to Berlin, nice atmospheric shots of sleeper and dining car in the morning. The action continues in the luxury villas and apartments of Berlin, Renate Müller wears a string of very elegant outfits. Misunderstandings, jealousies, temporary separation of husband and wife, a few songs, wicked humour.

Widower Paul always delayed talking to his daughter about sex. But when workers on a nearby construction site are falling down their scaffold because 16 years old "Herzblatt" is tanning naked, he feels he has to take action. In the hope she'll learn herself what consequences the difference between boys and girls has, he tries to get her a boyfriend.