Arda Turan, a former competitive swimmer, has just started her job with the Duisburg water police when the first body is found. Stefan Buhl lies dead at the edge of the harbor. What Carsten Heinrich from the criminal investigation department quickly identifies as a fatal accident at work raises doubts in Gerhard Jäger, who was transferred from the homicide division to the "WaPo" as a punishment. One look at the body tells him it was murder. But leave the investigation to the criminal investigation department? No way!
Das Erste