British and French detectives are brought together when a body is discovered inside the Channel Tunnel, sparking a complex cross-Channel investigation.

Alex, a graceful nine-year-old boy who wants to be a girl, has a dream: to be elected Miss France one day. Fifteen years later, Alex loses his parents and self-confidence and ends up in a monotonous 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.