When the club owner Otto Hübner is found shot, Inspector Bibi Fellner has to drive to the crime scene without her partner. Moritz Eisner, who celebrated his 60th birthday the evening before, is sleeping off his intoxication. As soon as he gets back to work, Hübner's business partner shoots the inspector. The bullet only grazes Eisner, but he soon faces serious problems. Traces of the crime scene and other evidence make him a suspect!

Although Eisner remembers little after his film tear, Bibi believes his protestations of innocence. At a manufacturer of lifelike 3D masks, the two come across social media photos of Eisner that Claudia's new friend Lukas posted. Although police chief “Ernstl” Rauter believes in Eisner’s innocence, “the internal affairs department” does not hesitate to arrest his colleague. In order to find out who wants to frame the inspector for murder, Bibi not only has to find a killer, but also has to turn to previous cases.