Investigator Nora and her new coworker Ben investigate the case of Peter Marquart, a Lübeck psychology professor found murdered in his home. Their first lead takes them to Jessica, a 16-year-old schoolgirl who posts revealing pictures and videos of herself on her fee-based website. Not long after, a nursery school administrator is murdered. When the investigators delve into the past of the two victims, the case takes on a whole new dimension.