A young heiress is kidnapped by two aspiring thieves who are then captured by a mad scientist. It's up to the police, Santo, and Blue Demon to rescue them.

• Películas Latinoamericanas S.A.
• El Santo
• Blue Demon
• Víctor Junco
• César del Campo
• Elsa Cárdenas
• Antonio de Hud
• Fernando Osés
• Quintín Bulnes