Frank Elling and Lona Mendt must enter the lion's den. All clues point in one direction and to powerful backers.

Frank Elling and Lona Mendt have to cross moral and legal boundaries to get to the motive for the murder series and thus the masterminds behind the conspiracy.

When Jasper is kidnapped and Elling is attacked by the killer, nerves are on edge and Bernd Peters forces Lona to make a momentous decision.

Schwerin is sweating. It's the hottest summer in years. Detectives Lona Mendt and Frank Elling investigate a man who was hung upside down in his bathroom with his throat cut. When another victim is murdered shortly thereafter, the act of a serial killer becomes apparent.