This second Republic-serial adaptation of the popular radio series The Lone Ranger abandons the "mystery" angle of the first (1938's The Lone Ranger) in favor of a straightforward action tale. Robert Livingston stars as Bill Andrews, alias the "Masked Rider of the Plains," while Chief Thundercloud is his faithful Indian companion Tonto. When cattle baron Craig Dolan (J. Farrell McDonald) is suspected of conducting a campaign of terror to rid the territory of settlers, Andrews investigates. Upon discovering that the real villain of the piece is Dolan's scheming nephew Bart, Andrews adopts his Lone Ranger guise, and together with Tonto and their mutual Mexican friend Juan Vasquez (Duncan Renaldo) they lay the groundwork for Bart's ultimate defeat. Many of Alberto Colombo's musical themes were incorporating into the Lone Ranger radio program, achieving a kind of immortality in the process. The heroine is played by Jinx Falken, later famous as TV personality Jinx Falkenberg.