On a remote site in Köpenick, a judge is found dead hanging from a bridge. The pathologist quickly rules out a suicide. Investigations revealed that the site was not the scene of the crime and that the victim drowned. Freund and Heffler are not only looking for a murderer, but also for the reason why Thomas Eichler was pilloried after the murder.

Fabian Seifert lies dead in his Köpenick apartment. He had exploited a gray area in the law and legally distributed an LSD derivative. Was his business idea fatal to him?

Robert and his colleague Kay clash with his lawyer Rico Heilmann during the arrest of a young violent criminal. While Kay goes clubbing after work, Robert goes home to his daughters. He is woken up early in the morning: Kay was murdered that night. She was shot with her own service weapon in an abandoned backyard. Why did she have drugs with her? And why does the social worker Theresa think that Kay worked as a nurse? When Robert finds Kay a threatening message from the youth who was arrested the day before, he seems to lose control. His behavior means that department head Katharina has to temporarily suspend him from duty.