Dr. med. Job Prätorius enjoys great popularity among patients, doctors and students alike thanks to his kindness and philanthropy. Only his colleague Prof. Speiter begrudges him his success. When his patient Maria Violetta wants to commit suicide because of an extramarital pregnancy, Prätorius takes care of the young woman. When he tries to gently prepare her father for the news, the latter considers Praetorius to be a more than welcome admirer of his daughter. As a deep affection develops between the doctor and his patient, the two eventually marry. Their private happiness fuels Prof. Speiter's envy. With the help of Praetorius' mysterious factotum Shunderson, he finally believes that he can uncover some dark secrets from the doctor's past. But Praetorius manages to refute all the accusations in a court of honor with wit and astonishing revelations.

A young officer suffers under his ambitious wife, who is determined to make a captain out of him. Meanwhile, ship's cook Andresen becomes a father and, for the sake of his wife, becomes an innkeeper ashore, but he is still driven by wanderlust.

Hotel manager Lis has loved the doctor Dr. med. Peter Arco since her childhood, who could theoretically be her father, still sees a child in her and is also the best friend of her brother Georg. Since Peter lives alone as a confirmed bachelor, Lis thinks of a ruse. She claims to be pregnant, but to have long since left the father of the unborn child. Georg, who wants to run for mayor in the next election, could cost his almost secure position with an illegitimate child in the family. Lis convinces him that one of his best friends should be willing to marry her for a contractually agreed short period of time and then divorce her again after the child is born. She suggests Peter, of whom she has a portrait, to whom she talks secretly. Georg persuades Peter to marry Lis and he stands by his friend ...

Edgar Koltz travels back to Germany from his vacation destination on Mallorca. Koltz, who is traveling under the false name Heinrich Hauser, wants to use the 48-hour break in his vacation to rob the Munich Commercial and Credit Bank. He is called out under this name shortly after landing at the airport. Koltz receives an envelope containing an address where he can obtain further information. Later, the driver of the 8:10 train discovers a body on the tracks. The police have to establish whether there is a connection between the discovery of the body and the bank robbery in Munich.

Murder mystery following the revenge for the theft of a sapphire from a Buddha in a Thailand temple.