Philippe Garrec, communications director for a subsidiary of a pharmaceutical laboratory, is found dead, horribly mutilated: he has been emasculated. Nadia Lintz, investigating judge, inherits the investigation. She comes into contact with Commander Rovère, who must support her in her investigations. Unfortunately for her, the police officer shows an undeniable penchant for alcohol. However, he manages to practice his profession without making too many waves. The judge first questions the victim's wife, who has collapsed.

The body of a 17-year-old girl, Isabelle Cauvier, is found in the Ourcq canal. The unfortunate woman, totally disfigured, was attacked savagely. Gifted in drawing as in painting, she seemed destined for a successful artistic career and attended the Beaux-Arts. However, according to Violaine, who shared her studio with her, a few months ago, the brilliant student had completely changed her life. She had started taking drugs, and changed her appearance...