When Matthew. a stockbreeder. finds one of his bulls slaughtered by thieves. he calls his childhood friend. Chief Superintendent François Ferrand.
At forty-five. the detective is a respected. solitary and rather eccentric man. He lives in a former lighthouse and has a long-standing relationship with Marie. a gypsy bar owner.
Ferrand is shaken when he finds the body of a young photographer friend. Patricia. beside another slaughtered bull. Did she catch the thieves red-handed or did someone else commit the murder? His perfect knowledge of the region and its inhabitants leads Ferrand to the cattle thieves.