Project manager Kevin returns to his childhood on the island of Sylt on a vacation with his daughter, motivated by closing a big deal there, since his company plans to build luxury apartments on a piece of land.

Retired teacher Ulla is celebrating her golden wedding anniversary with her husband Paul. Unfortunately, Ulla's romantic idea of renewing their vows backfires, as her husband has fallen in love with Ulla's best friend.

On the North Sea coast, jack of all trades Knud tries his hand at crab fishing, betting on sports and small-time cons. He’s just trying to score an award for his Shanty Choir, which has seen better days, when his son Lenny shows up for the first time in a decade.

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.

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.