Billon organizes all the details of his wedding. That's when a murder takes place, in a locked room. What really happened? Who are the suspects?

Samy returns to medical school: one of his former professors and a student have been found dead in a room in the university residence. The future coroner finds a place that is dear to him and where he spent a lot of time. With Charlie Holmes, they embark on an investigation that promises to be more complicated than he thought. What was the real relationship between this professor and her student? Who was targeted, the student or the professor, or both? More than ever, the duo must blend in with the crowd to unmask the culprit.

Lou, a young model with flamboyant beauty, is found dead in her hotel room, the day before a prestigious competition. Was she killed by a jealous competitor? Charlie, upset by the tragic fate of this orphan, tries to discover who she really was, beyond appearances. Because beneath her airs of a model little girl, it would seem that Lou hides many secrets.

Iris, a choreographer and hip-hop dancer, has just witnessed the kidnapping of her sister Violette! Since the young woman has a serious heart condition, every second counts in the search for clues to locate her. While Chris sets out on the trail of a rivalry between sisters, Charlie and Samy immerse themselves in rehearsals for the next video clip choreographed by Iris, at the Musée des Arts in Nantes. What if these two leads ended up coming together?

A man is found dead, apparently from a heart attack, during his workout. Our investigators quickly discover that the victim had a double identity. So who, Jerome, the seemingly ordinary accountant, or Daniel, a testosterone-fueled MMA fighter, has attracted the wrath of a murderer?

Charlie and Samy stumble upon a body in the street. Everything suggests that it was a natural death, but Charlie's instinct pushes her to follow the trail of cat scratches covering the body. Especially since after an initial neighborhood investigation, our cops discover that the victim didn't have a cat...