In the mid-19th century, in a remote area of the Basque region of Spain. Alfred Ortiz (Ramón Agirre), a well-dressed man, came to a local town. He claimed to work for the provincial government. The purpose of this trip was to find the first blacksmith, Percy Francisco (Kandido Uranga), nicknamed "The Hammer", to understand the situation. From the local population, it was learned that the Hammer had a bad temper and was difficult to get along with. The blacksmith's shop was in ruins. According to rumors, this blacksmith was regarded as a devil. Not long after, the men in the town figured out Ortiz's true intentions. It turned out that after the Spanish bourgeois revolution several years ago, it was rumored that Carlos's gold was hidden in the blacksmith's shop. The greedy townspeople and Ortiz went to the blacksmith's shop, but they didn't know that this was the terrifying place where the devil of hell appeared... This film is adapted from a Spanish folk story.