This is the story of a hunt for a serial killer. The infamous female murderer Jeanne Deber has been behind bars for a quarter of a century, but someone begins to precisely replicate the crimes she committed before her arrest. The police are at a loss, but they find only one way to solve the case - to involve Jeanne herself in the search. She agrees, but on her own terms: if she manages to contact the imitator, she will be allowed to see her son, who has now become a police officer.