The enterprising Anton Klapproth runs a flying duck farm in the Eifel, but now he finally wants to experience a real adventure in the big city of Cologne. A visit to a sanatorium for the mentally ill seems particularly sensational to him, as there is certainly a lot going on there with the "Jecken" and would provide plenty of story material for his regulars' table. In return for a loan, Anton's nephew allows his uncle to stay at the Pension Schöller. However, the guests there are by no means mentally ill, just rather eccentric. However, the unsuspecting Anton has a great time, thinking he is in a psychiatric institution.

For Ursula Gothe, the wife of the up-and-coming engineer Dr. Richard Gothe, life in the post-war period is finally back on track. That changes when she rediscovers her daughter Martina, who she thought was dead, in a wanted ad. Ursula is stunned with joy, but also very scared: the girl is from a man she met during the war, before her time with Richard. Now Richard is about to be promoted to factory manager and does not want to be discredited because of an illegitimate child.

Berlin pensioner Paul Krüger gets to know his place of birth in the Czech Republic.