Chief engineer of Saarländ's Rosdorf nuclear plant Georg Bekker appears dead, supposedly of a drug overdose, and detective Max Palu takes charge of the investigation, meanwhile, Georg's sister starts recieveing mysterious floppy disks and becomes the target of threats along her daughter.

Rich, 60-year-old Erika was the victim of a robbery and murder. Since the neighbor saw her grandson leaving the house with a video recorder under his arm, he was the first suspect.

A psychopathic former actor escapes from a psychiatric clinic to take revenge on the woman who put him behind bars: Detective Lena Odenthal. While Hans-Martin Carsdorff perfidiously stalks and psychologically terrorizes the detective, Odenthal must simultaneously solve the murder of an elderly woman.

The son of an old crook is murdered. This crime brings the Düsseldorf homicide squad, as well as Hans Gebhard (the father) and Kalle Maisch (his old criminal buddy), into action.