The Weimar detectives Kira Dorn and Lessing are called to the crime scene in the town hall. During a robbery at the city treasury, the secretary Sylvia Kleinert was shot dead by a masked perpetrator. They soon find evidence that it was a targeted murder. When it turns out that Sylvia was having an affair with the city treasurer Iwan Windisch, the inspectors set their sights on him. Did he order the robbery and murder of Sylvia to prevent his extremely jealous wife Nicole from finding out about the affair? During their research, Kira Dorn and Lessing come across Rita Eisenheim, who runs a ghost train with her husband Josef and has come to Rudolstadt near Weimar for the hustle and bustle .
The allegedly missing Josef Eisenheim shows an incredible resemblance to Iwan Windisch in a photo - could it be the same man? The inspectors begin to suspect that the city treasurer is leading a bizarre double life. His secretary may have died because she blackmailed him about it. The money stolen during the robbery is also being sought. The inspectors suspect that Caspar Bogdanski, who has just been released from prison, is hired as a chainsaw clown on Rita Eisenheim's ghost train - During their investigations, Kira and Lessing delve deep into the madness of Weimar again and Lessing has to prove to Kira in a painful way that he is a whole guy.