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Having survived the exploding wagon, Zorro and his legion return the stolen ammunition to San Mendolito with the message that the masked avenger "always fulfills his promise." Questioning Volita (Sheila Darcy), council members Felipe (Leander de Cordova) and Manuel (John Merton) are told that Ramon (William Corson) and Don Diego (Reed Hadley) are tending to the latter's cattle. "Don Diego has finally discovered that it takes a real man to run a ranch," Volita remarks disdainfully. On their way back to the council, Felipe and Manuel spy Ramon handing Zorro medicine for the wounded Miguel (Gordon Clark) and realize that they may learn the identity of the masked avenger by capturing the young man. Don del Oro instructs his henchmen to do just that, and Moreno (James Pierce) has one of the gang replace Ramon's groom Juan (Budd Buster). The plan works and both Ramon and his sister Volita find themselves at the mercy of the villains in a scary dungeon. Learning the fate of his friends from the captured, false groom, Zorro hastens to the rescue, and after some swordplay with the gang, is himself imprisoned in a sparse room. Only it isn't a room at all, but a cleverly devised torture chamber.