While in France, the daughter of Copenhagen's police chief meets a fascinating detective who is seeking a criminal professor.

Elga's life with Magnus, her husband, would be a happy one if Struwe, her former lover, had not resurfaced and started to blackmail her.For a while, he has been extorting money from her, threatening, if she didn't, to reveal all the details about their past life. In desperation, Elga decides to disappear and goes to another town where, forsaken and forlorn, she sinks lower and lower. One day, Magnus, who has not forgotten her, meets her by chance. And he falls in love with this stray creature who reminds him of the one who left him so suddenly...

An unemployed engineer who does not want his fiancee to protect him has accidentally insulted his future boss, unknown and for no reason. From this meager idea, a stupidly rolled-out confusion with pop song in a Mexico bar develops.

Werner Dux, heir of the big car company "Dux-Werke", is a gambler who has just been arrested in Chicago for shooting a cardsharper. While in jail, he learns from his friend Michael Nissen that his father has died recently. That means that the Dux-Werke are without a leader at the moment, for Werner's cousin Steffie, who is his co-heiress, is still too young to run the firm. In this situation, Werner convinces his friend Michael, who is an engineer by profession, to take over the firm as long as he is in jail and to pose as him. Michael agrees and is able to bring the firm up again. He even arranges a reliability test for motorcycles via Istanbul, Rome and Barcelona, which creates a big Turkish order for the company. When the real Werner escapes from jail and arrives in Germany, it looks as if the whole story is up to bust. But Werner needs money, so he convinces Michael to go on as before and hand over all profits of the firm to him.