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...

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?