A young woman is found dead in the river. Together with her friend Klarissa, she had been running a hair salon for two years, which was particularly popular with men. Initial suspicion falls on the aggressive ex-boyfriend of the deceased, Arthur Latzka, to whom she owed money. But there is no evidence against him.

In the course of his investigations, Jerry comes across an escort service that the two women ran in a romantic hotel. What role did the shady concierge play in the young woman's murder, and who was her last anonymous guest? These questions lead Jerry and Beissl on the trail of the murderer.