In this two-part investigation, it is the skeletons of a woman, two children and a dog that are discovered at the bottom of a hole. Quickly, Darius and his team discover the identity of the man who would respectively be the husband and father of the victims. But upon arriving on site, a surprise: the man they come to see lives with his wife and children, and pretends to have stolen his identity that dates back several years. So, who is hiding behind these terrible crimes? At the same time, we follow a man who seems to want to get closer to his young son, summoning a terrible fear in his ex-wife... How are these two stories linked? For his part, Darius finally finds the final lead that will allow him to discover the truth about his origins. A trail with a name: "La Ruche," a community of people who advocate degrowth and a return to Nature...