Slim Duane, a wandering cowpuncher in search of his stolen horse, is forced by a fugitive to exchange clothes and finds himself stranded and broke in a town. He is seen by Eben Purkiss, who mistakenly identifies him as the fugitive (Matt Holden) and rides for the sheriff.
Cal Roberts can ride anything with four legs. He enters the contests held at big rodeo. He wins all honors and meets a girl who races horses to help her father clear pressing debts. Complications follow, but Cal wins the girl.
Two families feud over possession of a valuable waterhole.
The Rough Riders are called in to help save Master's stage line. Taggart has his gang robbing the stages and shooting the drivers. When Buck drives the next stage, Taggart's men rob it and then make it look like Roberts is part of the gang. Written by Maurice Van Auken