Riot in Hamburg: Convicted serial killer Born disappears without a trace when he is released with his therapist Simon Ruder. Because chief inspector Jan Casstorff had arrested Born at the time, he is called into the case. But even he cannot prevent two more prostitutes from being killed in quick succession. While the pimp Schöndauer swears revenge, the report by the psychologist Ruder, who believed Born had been treated and allowed him to go free, seems to have been definitively refuted. Shortly after, Born is found hanged. The case seems settled. But during their investigations into the red-light district and the circumstances of Born's escape, Casstorff, Eduard Holicek and Jenny Graf come across information that suggests a different, outrageous background to the crime.