A group called Schwarzer Kreis is leaving chaotic pamphlets alongside occult symbols in Hamburg cemeteries, hinting at impending violent crimes. Is it just harmless fun from bored teenagers? Commissioner Bombach has a bad feeling about it. He asks his friend Michael Staller, a well-known police reporter, for discreet assistance. The journalist's sources often complement the official resources of the police very well. Two dead bodies in a short span of time make it clear to Staller: this is not about attention-seeking teenage Satanists. A mysterious master of the Schwarzer Kreis and his sadistic high priestess are pulling the strings in a strange game. But what are their intentions? The answer deeply shocks Bombach and Staller. A coldly calculating extortionist is threatening the Hanseatic city with outright terror in the name of the Schwarzer Kreis. He demands money and...