The aircraft mechanic Hans Bertram is an incorrigible apron hunter who boasts that he can get around any woman. He even makes bets on it. But then he falls in love with the new colleague, the budding engineer Helga Nonnert. He fails to conquer them by storm. After many tangles and fun episodes, she manages to heal him of his gallant frivolity.

Russian soldier Grisha escapes from a German prisoner-of-war camp in the spring of 1917. He is caught and is to be shot as a spy. This decision is controversial. The dispute continues. Grisha is executed on the orders of the army high command.

The story of the steel melter Martin Hoff, whose factory delegates him to a drama school, corresponds to the real life of the actor Manfred Krug. Like his (film) hero, Krug works as a steel melter, does artwork, sings and acts, and is sent to drama school. Like his hero, who behaves anarchically and conspicuously, Krug is soon expelled from school.

The film centers on the story of newlyweds Inga and Heinz. Heinz works in the western sector of Berlin. A gang of crooks involved in various shady dealings tries to draw Heinz into their dark affairs. However, after accidentally learning about the "activities" of his "friends," Heinz informs the police about the impending crime. The gang is arrested.

Engineer Strebel′s apprentices think of nothing else but music and dancing, although they should really concentrate on their marks. Consequently, Strebel is anything but delighted with his pupil. To top it all, a TV show becomes interested in a performance by Strebel′s apprentices. To calm down their teacher, Jutta Fröhlich, who has already cast an eye on Strebel, makes him an offer: When they better their marks, Strebel would permit them to make a performance on television.

This film continues the story of radio operator Ludwig Bartuschek from “The Sailor’s Song”. Near the end of the Weimar Republic, Bartuschek (Erwin Geschonneck) is working as a mechanic in the Sperber airplane plant. Director Dehringer offers him the opportunity to train as an airplane constructor if he is willing to give up his communist beliefs under oath. Bartuschek will not allow himself to be bought and instead joins the underground resistance movement.