After a fierce argument Steffi Zinn′s husband leaves the joint flat and stays away from home over night. The next morning, his wife Steffi has disappeared and is reported as a missing person. Captain Lohm takes over the case and at first looks for signs of a murder, but to no avail. Then, Steffi′s body is found in a lake. After her funeral, a stranger who had attended Steffi′s funeral for a short time is also found dead in a lake, and the connection between the two cases becomes apparent.

The Klemmers and the Neuberts live in a two-family house. The day before their driving test, Egon Klemmer and Bruno Neubert secretly buy a small blue Saporoshez from Ms. Stepper. Buying a car triggers turbulent entanglements, primarily due to Egon, who uses the little blue man for a secret jaunt.

Heinz is a well-stocked veterinarian in Klückow and his Jana in quite firm, although not always present hands. And now - as Aunt Alma is slowly getting rid of the concern for her beloved nephew - Dr. Kröpelin finally got his chance: he makes a marriage proposal to Alma. She would not be averse if it had not been his "bloodthirsty" hobby, the hunt. A get-together on the high seat is still not a desirable prospect for Alma. But the more she refuses, the tighter Kröpelin bites into his intention to marry her anyway, whatever the cost.

The little African girl Asina is eagerly waiting for her new friend Karli. Karli is a young sailor from Rostock who has promised her a gift on his next arrival in Coccatuttibana. Karli keeps his promise and smuggles a stowaway onboard the “MS Wismar”. Kasimir, a snowman, finds shelter in a cooling chamber. Although the journey turns out to be turbulent, Karli and Kasimir manage to arrive in Africa in good health.

Alma Krause is the proud owner of a thoroughbred French bully. Even otherwise, she nurses and harbors several two- and four-legged friends in her apartment - just as one would expect from a veterinarian's widow. Her nephew Heinz, on the other hand, is kind of beaten. Not as for the love of animals, that would fit badly to a nascent vet, but for a small animal practice, as the blessed uncle operated, he seems to have no ambitions. A future as a "Bazillenscheuche" in the cowshed would like to spare him again Aunt Alma. And she takes her appropriate action.