Inspector Hartmann is assigned to look into a spectacular wave of suicides that is sweeping Berlin. His investigation leads him to an attractive young woman, Sonja Vogle, whose portrait appears on screens throughout the country promoting the holiday company Theratos. The latter is owned by Sonja’s adopted father, the powerful media magnate Heinrich Marsfeldt. It transpires that many of the suicide victims were known to have signed up with Theratos shortly before they died, so to resolve the mystery Hartmann and Sonja decide to try the Theratos experience for themselves.