AllMovie

Surviving Manuel's bullets, Zorro (Reed Hadley) manages to get away just as the runaway stage crashes into a ravine. With the assistance of Ramon (William Corson), Zorro brings the unconscious Manuel to the cabin of José (Jimmy Fawcett), one of the legionnaires. Dressed in Manuel's uniform and sporting a bandage that completely covers his features, Ramon is then deposited in the San Mendolito jail. Fearful that the wounded commandant may reveal his identity, Don del Oro assigns Valdez (Charles King) and Carlos (Theodore Lorch) to kill him. Using subterfuge, the two henchmen manage to get inside the fortress, where they quickly locate the man they believe is Manuel. "Don del Oro no longer has any use for you," Carlos hisses as Valdez is lighting a devastating fire. Happily, Zorro arrives just in time to rescue Ramon, but the latter is soon once again in the hands of Valdez. Trailed by Zorro, Valdez and his men bring the still-bandaged Ramon to Don del Oro's mountain hideout. While Zorro battles the henchmen, the real Manuel, who has tricked José, turns up. Realizing that Don del Oro has betrayed him, the commandant makes a quick getaway, while Zorro and Ramon are driven further into the mountain. To rid himself of the pesky intruders once and for all, Don del Oro has his men move some boulders and a raging underground river is unleashed, threatening to drown our heroes.