For Neele and her life partner Steff, the dream of having one's own child finally seems to come true: Steff is pregnant. However, there was a confusion in the artificial insemination - instead of their carefully selected sperm donor, they caught a sperm donation from a gay couple: Kalle and Jens also want a baby and consider the confusion as a kind of coincidence. While the two men look forward to their time as active fathers, Neele and Steff see their harmonious trinity at risk.

In a hospital in Hamburg, an unidentified woman is disconnected from the life-support system. While the investigators search for the mysterious perpetrator, two more men are murdered.

The dynamic detective Stefanie Posch from the Federal Police is transferred to the countryside in Schleswig-Holstein to solve a case. A blackmailer is sawing small pieces of rail out of the tracks and threatening to resize them if the railroad doesn't pay up. Stefanie Posch causes quite a stir at her new place of work, not only with the cunning villagers but also with the local police.

Village policeman Husmann bids farewell to his boss Eggers on his well-deserved retirement. Tough Inspector Posch is put in temporary charge of the small police station in Eggeborg. Shortly afterwards, the first case arises: an unknown person is smearing cows with aggressive slogans at night. Stefanie Posch and local policeman Thies Husmann take over the investigation, which quickly leads them from the cows to a completely different, much more dubious mystery.