Set in Paris the story follows Lisa, who, while on vacation with her husband, rekindles a passionate affair with her ex-boyfriend. But that may lead to a murder.
A professor saves the life of a wounded hitman who, in exchange, promises to find and kill his enemy. Even though the professor says he has no enemies, the killer goes on a mission and transforms the professor's life.
In the Alps, a caravan burns, enclosing a seasonal worker in its flames. Emilie Karras, a young gendarme from Lyon, originally from Les Clairies, leads the investigation, forced to collaborate with Major Servoz, a disillusioned local gendarme.
