The body of Rüdiger Sutor, known as Rüde, a member of the Dark Dogs biker gang, is found on a country road. But it quickly becomes clear that Rüde did not have an accident on the street with his Harley Davidson. It was murder, cause of death was a broken neck. The remaining gang members of the "Dark Dogs" are immediately targeted by the investigations. But a rival rocker gang is also a possibility, since on the night of the murder the clubhouse of the "Dark Dogs" was shot at by an unknown person with an Uzi. Chief Inspector Jens Stellbrink (Devid Striesow) bites on granite in his investigations. Because the rockers are well organized and have an excellent lawyer. In any case, the biker circles do not cooperate with the police as a matter of principle, because the milieu regulates its problems among itself.absolute secrecy. That doesn't make Stellbrink's work any easier. It doesn't help that Stellbrink's colleague Lisa Marx (Elisabeth Brück) has some insider knowledge. She doesn't like Stellbrink's relaxed way of investigating this matter at all. You are aware of the danger posed by the rockers. Despite everything, Stellbrink doesn't listen to her warnings, he gets dangerously close to the gang during his investigations. And then public prosecutor Nicole Dubois (Sandra Steinbach) gets involved in the ongoing investigation. Because the "Dark Dogs" have been the focus of targeted observation for years due to their criminal activities and their involvement in the drug business. The fact that Dubois interfered is a thorn in Stellbrink's side. He has no other choice: