Benito Freire is a peddler who lives miserably in an environment dominated by ignorance and superstition. He is dedicated to peddling by the Galician towns and suffers severe attacks of epilepsy. Through the region begins to spread the rumor that he is a werewolf and that he is possessed by a demonic spirit. And it will be precisely the stories that people are telling about him what start to make him go crazy.