A fishing trawler from Dorumer pulls an unclothed female corpse from the sea. The forensic examination reveals a violent death. It's a case for the Cuxhaven police. But where should Chief Inspector Röverkamp begin his investigation? No clothes, no papers, no matches with missing persons reports. To make matters worse, his boss has assigned him Marie Janssen, a young police academy graduate. The "Red Claas," a figure from old legends that supposedly roams between Otterndorf and Bremerhaven in search of maidens, is likely to blame once again, as has been the case in many unresolved murders of women. However, Marie Janssen is driven by the thrill of the chase. She digs into old investigation files and draws parallels. When another woman goes missing without a trace, the case gains momentum. Just at this moment, Chief Inspector Röverkamp falls ill, and his assistant must investigate alone.