Bodies were discovered early in the morning in various parts of Toulouse, and the case was handed over to senior captain Simon Keller for investigation. Is C, who just graduated from the police academy, assisting in the case? Cile Gimet, this is her first on-site investigation. They found that the murder case was related to the lyrics of a song by Claude Nougaro. Illness ridden Keller hopes to close the case as soon as possible, C? Cile will find that this case brings back the painful secrets of childhood.

Elisabeth and Paul investigate the murder of a tour guide in a cave.