1903, Ropraz, a small village near the Jura Mountains of Switzerland. On a howling December day, a lone walker discovers a recently opened tomb, the body of a young woman violated, her left hand cut off, genitals mutilated, and heart carved out. There is horror in the nearby villages: the return of atavistic superstitions and mutual suspicions. Then two more bodies are violated. A suspect must be found. Favez, a stableboy with bloodshot eyes, is arrested and placed in psychiatric care. He escapes, enlists in the Foreign Legion as the First World War begins, and is sent into battle in the trenches of the Somme.