A young woman does everything she can to catch the eye of her chosen one. In the end, she even goes into the water - wearing a diving suit. A cheerful underwater love story for GDR television, which also casually promotes the diving section of the pre-military Society for Sport and Technology in the GDR.

The main character Otto, the "best man", is a copy of the illustrious Mister Bean. He takes on an apprenticeship as a building-worker, which makes him a member of a building brigade. At the same time Otto tries to start a love affair, which he handles even clumsier. Never the less Otto makes progress with the lady in question, a single mother, who apparently doesn't mind. Actually he wanted her sister, but a retired Leninist party member changes his mind. This gives him the courage to persevere in his work, albeit with the helping hand of the obligatory retired party member. And behold, in the end Otto invents a new method of building, which saves the brigade many hours of work.

A classic love triangle is transposed onto the lives of three medical students in Leipzig. Udo loves Tini, his friend Tommy’s fiancée. Tini is torn between choosing one man over the other. Meanwhile, Britta has renewed her studies after giving up on acting, and wonders if she has made the right decision.

A conference is to be held once again to discuss the construction of a new dam, which Professor Paul Satie rejects. During a train journey, he spontaneously leaves the train. Here in Wolfsgrün, from 1948 to 1950, he helped build the old, now far too small dam as a youth brigadier. He and the others who helped build it have erected a monument to this. A monument with his name on it. Is that perhaps why he is against the new dam?