A delivery driver is run over by a car in Berlin. The accident quickly turns out to be murder. Susanne Bonard (Corinna Harfouch) and Robert Karow (Mark Waschke) search for clues in the victim's surroundings: the victim had an affair with a security guard at the Federal Printing Office. The detectives suspect a connection, and little by little, Bonard and Karow uncover a larger plot. But who are the masterminds, and is the dead man's lover involved?