Balthazar and Bach finally track down a suspect in Lise's murder case, only to find he has been dead for 10 years and the real killer has been using the identity of the deceased. Balthazar has little time to process his emotions before being pulled into a triple homicide investigation of teenagers butchered during a camping trip.

When Lise's killer sends Balthazar a video of her being murdered, Balthazar relies on drugs to numb the pain and starts to lose his grip on reality. Meanwhile, a disturbed man wearing a woman's bloody scalp walks into the police station offering no explanation for his state.