The body of a young woman is found dismembered. Her murderer took care to send all of her body parts out to addresses all over France. The victim, 22-year old Violette Grimal, was living with her younger sister Eglantine. The criminal brigade finds Eglantine alone in their apartment, giving birth. The leads to find Violette’s killer are weak, especially since her sister refuses to reveal the father of her child. A mysterious man she seems to fear, and who could well be the key to the investigation. After a year-long break, Lamarck comes back to the team. Chloe settles…