Detective Pierre Niémans and his partner Camille Delauney investigate a series of brutal crimes in remote French regions, unveiling dark regional myths and forgotten customs beyond the scope of local authorities.

Following the Guernon case in the mid-2000s, Captain Pierre Niémans was transferred to the head of the Central Office against violent crime (OCCS). This new confidential unit deals with the most complex cases, where the clues are few and where serial murders must be resolved as quickly as possible. During a particularly difficult mission, Niémans stumbles upon his best pupil and spiritual daughter, Camille Delaunay.—Happy_Evil_Dude