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.

The talented young entrepreneur Finn Sieveking has to cope with the death of his mother Maria, who was always at his side in the management of the traditional Hamburg family business. Out of nowhere the adventurer Jonathan Clark appears, who introduces himself as his biological father. Finn has to cooperate with him unwillingly, because Maria has bequeathed both of them half of their business shares. Only gradually does Finn begin to understand what his clever mother intended.

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.