The investigator Nora Weiss and her new colleague Ben Salawi are investigating the case of the Lübeck psychology professor Peter Marquart, who is found murdered in his house. A first clue leads her to the 16-year-old student Jessica Steiner, who posts revealing pictures and videos of herself on her own paid website. Shortly thereafter, a daycare manager is murdered. Not only does it turn out that he was an acquaintance of Peter Marquart, but also that he was also in contact with Jessica. The suspicion now falls on Jessica's father Jörg Steiner, who had written threatening emails to both victims . Incriminating evidence was also found on him. But Nora Weiss has doubts as to whether Jörg Steiner is actually the perpetrator.
When the investigators examine the past of both victims, the case takes on a whole new dimension. Years ago, both men were employed at a private home for troubled youth that made headlines for the mistreatment of inmates. Does anyone want revenge for the misconduct of the employees at the time? And are there other people on the death list?