Weekend in Berlin: in search of an unforgettable night, party-goers and party-goers roam the wintry streets. A young woman finds a suitable date in the couple Dennis Ziegler and Julia Hoff via a dating app. The next morning, a body is found near Dennis' apartment. Her face is disfigured so that identification seems impossible. A missing person report and a subsequent DNA comparison reveal to inspectors Nina Rubin and Robert Karow that the dead woman is the medical student Sophia Bader. When Rubin and Karow deliver the news of death to Marianne and Helmut Bader, the parents deny that the dead woman is their daughter and deny that she used dating portals. To the police's surprise, Dennis Ziegler and Julia Hoff appear at the police station. They explain that after consensual sex with Sophia, they broke up that same evening. But Dennis doesn't seem innocent. A thick police file testifies to allegations of arson, assault and rape. But he was never convicted. The suspicion quickly arises that his parents - the patrol officer Doris and the security expert Claus Ziegler succeeded time and again in pulling the son's neck out of the noose. And again the parents' fingers seem to be involved, the investigators run into a wall. Rubin and Karow have to employ drastic methods to break through the psychogram of the Ziegler family - and to understand why Sophia's parents so vehemently deny their daughter's death.
—ARD Das Erste