A wolf kills lambs. At first only lambs. Then it kills a woman. And continues with lambs. Until it kills the first man.

The teeth marks testify that it is a gigantic, unnatural, supernatural wolf. This awakens in the souls of simple country people memories of old legends about werewolves that come out at night and spread death. When the unnatural wolf kills another person, the case will be taken over by the police officer Jean-Baptiste Adamsberg who happens to be in the area.