Agent Mala, an intelligence operative, investigates sabotage on remote Clipper Island in the South Pacific. A gang of spies causes the eruption of a volcano, for which Mala is blamed. He convinces the native Princess Melani of his innocence and helps her ward off a takeover by rival High Priest and spy collaborator Porotu and discover the identity of spy ringleader H.K. A great retro-serial set on a mysterious island in the South Pacific. Starring Ray Mala as Mala, operative of the United States Intelligence Department undercover as a Pacific Dirigible Airlines radio operator. Also starring Rex the Wonder Horse and Buck the Dog.