Eisner (Harald Krassnitzer) and Fellner (Adele Neuhauser) are called to a crystal clear case: two dead bodies and a perpetrator who alerts the police himself and waits for the investigators at the crime scene. Murder weapon, motive and factual confession included. Murder out of jealousy, a paraded husband who lost his nerve. Everything could have gone so "smoothly" if the country's most cunning lawyer hadn't taken on the defense of the accused and obtained an acquittal. Shortly thereafter, the lawyer himself ends up on the autopsy table - and the acquitted disappears without a trace. To top it all off, Inkasso Heinzi (Simon Schwarz), an old acquaintance of Moritz and Bibi, turns up to once again put the friendship of the two to a hard test.