Benito Freire, a pedlar in a small village in northern Spain suffers from epileptic seizures and rumours start to spread that he may be a werewolf and responsible for a series of killings. The local Abbot is called upon to form a team to investigate, in an effort to halt the harrowing murders.

• Amboto
• José Luis López Vázquez
• Amparo Soler Leal
• Antonio Casas
• John Steiner
• Nuria Torray
• María Fernanda Ladrón de Guevara
• Alfredo Mayo
• Víctor Israel