 Jimmy Dixon (Bob Steele), pursued by a band of Mexicans, changes clothes with a tramp (Perry Murdock), who takes off on his horse. Four miles later, Jimmy walks onto the Double-O Ranch, from which he had been thrown off four years before by his Dad (John Elliott), who had blamed Jimmy for something that his twin brother Duke (also Bob Steele) had done. Duke, home from college, took over the ranch when Mr. Dixon became ill, and has run it into the ground. When Duke goes to the bank to repay a debt to Jimmy, he rides onto Phoenix with all of the ranch money. Jimmy, forced to pose as his brother, runs into Duke s fiancee, Jean Adams (Kay McCoy) and a Phoenix girl friend (Nancy De Shon), then has to fight Swede (Frank McCarroll) over a dancer (Hortense Petra). Jimmy learns that gambler Regan (Earl Dwire) and Duke plan to steal the Double-O herd along with the cattle they re already rustled from neighboring ranches. Duke tips Regan about Jimmy, who is nearly killed. Remorseful, Duke joins Jimmy in the showdown against the rustlers and dies protecting his father.