Arácnea's residents have been desperately searching for a source of food to save the life of their queen (a big spider). Earth is chosen, since human brains are apparently like health food for alien spiders
Joselito makes a trip from Spain, when his Grandmother, who lives in a Mexican Village, demands his presence. While in the country, travelling on a Stagecoach towards his destination, the vehicle is attacked by bandits. However, the boy escapes, and meets Antonio, who becomes a good friend