Charlie and Samy stumble upon a body in the street. Everything suggests a natural death, but Charlie's instinct pushes her to follow the trail of cat scratches covering the body. The detectives discover that the victim didn't have a cat.

A man is found dead while exercising. The cops soon discover that the victim had a double identity. So which of Jerome, the unremarkable accountant, or Daniel, the testosterone-fueled MMA fighter, has attracted the wrath of a murderer?

Dancer Iris has just witnessed the kidnapping of her sister Violette. While Chris investigates a rivalry between the sisters, Charlie and Samy immerse themselves in the rehearsals for Iris' next video clip at the Musée des Arts in Nantes.

Lou, a beautiful model, is found dead in her hotel room on the eve of a prestigious pageant. Charlie tries to discover who she really was, beyond appearances. Underneath her model exterior, it seems that Lou is hiding many secrets.

A teacher and a student have been found dead in a room at a university residence. What was really going on between this teacher and her student? And who was really targeted: the student, the teacher - or both?

Billon and Vinz have decided to put a ring on their finger. Accompanied by Charlie, Billon is on her way to Eternel Jour J to finalize her wedding plans when the director, Thomas, is found stabbed to death in his office.