In a remote corner of north-eastern France, hunters and farmers are at war over wild boar overpopulation and crop destruction. Brun, a 50-year-old farmer, struggles to keep his farm afloat. But Brun is also the last in a long line of hunters whose “black blood” burns in their veins like an addiction to hunting. When a local nobleman pushes him to the limit, Brun shoots him with his father’s rifle and disappears into the forest.
A year later, Brun is still on the run, and Fulda, a depressed cop transferred from Corsica to this godforsaken hole for disciplinary measures, is forced to investigate. But the wild boars proliferating in the region begin to invade his psyche, echoing strangely with his mistrust of women and his inability to comply with the rules. Things go from bad to worse when the psychologist assigned to Fulda turns out to be female, as well as attracted to him.
When he finally crosses paths with Brun, Fulda goes off the rails, fleeing into the wild himself.