After a number of oil company payrolls are stolen, wanted posters of Gypsy Ricco go up around Sioux City, Iowa. Cowboy Roy Rogers, in town to help out a singing group, investigates and learns that the singers' employer, the Great Southwestern Tent Show, was around at the time of each robbery. Roy and his sidekick, Cookie, focus on following Ricco, unaware that he's being framed by the show's manager, Harry Blaisdell.