When the village sheriff Frank Koops settles a dispute between the neighbors Ernst and Rudi, he has no idea that this is the prelude to murderous complications that go back far into the past.

A burglar hangs dead in St. Andreasberg from the roof of a holiday home that a mysterious art restorer lives in. This time, the village policeman Frank Koops received unwelcome support in his investigations: The ministerial official Kramer sent from the state capital did not leave his side to critically examine the capacity utilization of the remote police station.

Frank Koops has to deal with a criminal rocker gang and opaque BKA colleagues.

Policeman Koops witnesses a car accident. The dying driver gives him an envelope with the part of a code. Shortly thereafter, Koops gets in the sights of a contract killer.

The Harz village policeman Frank Koops cares little about adventures and even less about birthdays. So he only reluctantly goes on a survival weekend with Heiner, which his colleague Mette gave him for his birthday. When they set off, organizer Nora has no idea that fun is going to be serious this time.