In 1924, a remote village in Tarn mountains and endangered is the scene of several atrocious murders. Already tongues are loosened and some superstitions stand ... Nevertheless, the young Camille teacher refuses to give in to these beliefs of another age and calls for the rescue her childhood friend. This former criminologist, known for his investigations of the paranormal around and sees in these suspicious deaths that crimes perpetrated by the hand of man, will conduct the investigation in its own way ... but the killer was positioned on its diabolical scene. All is now a tactic and manipulation.