Frank Courtney, youthful heir to a multi-million dollar shipping line, is targeted for execution by its current president, Norman Bryan. To protect himself, the boy enlists the aid of scientist Bob Whitlock and his faithful dog Rin Tin Tin. But when the crooked businessman steals Bob's latest invention, a death ray that can destroy ships and planes from a distance, the entire world is now in jeopardy.
This exciting pre-Code serial stars Frankie Darro at the height of his popularity and famed animal actor Rin Tin Tin, Jr. The son of circus aerialists, Darro appeared in numerous silent films as a youngster (including a series of westerns opposite Tom Tyler) and found great success as the lead in William Wellman's Wild Boys of the Road (1933). Eternally youthful, he played teenage roles well into his twenties. He would also provide the voice of Lampwick in Pinocchio (1940) and was Robby the Robot in the sci-fi classic Forbidden Planet (1956). Rin Tin Tin, Jr. took over as Hollywood's premiere canine movie star in 1932.