Worn out by life after the loss of his son, a former doctor without borders becomes a night doctor. He comes across a delivery man on his bicycle and starts sending him to treat patients in his place.

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.