Boss rider "Careless" Carmody is made sheriff of an Arizona frontier town by Chicago swindler Prentice. The naive Carmody actually believes Prentice to be on the up and up and vouches for him in a land deal with Ruth Fellowes. Taken to the cleaners, so to speak, Ruth blames Carmody, who, in love with the girl, follows Prentice back to Chicago.
The story is set in Arizona, where the aptly nicknamed Yates is the proprietor of the local saloon. Unable to find any other work, pretty Mary Adams is forced to scrub floors in Yates' establishment. At first treating her with the same disdain that he extends to the rest of the townsfolk, Yates slowly but surely falls in love with Mary.
Percival Cadwallader Perkins was so bashful that whenever a woman would look at him he would blush like a beet, and this brought the "Happy Family," the cowboys of the Flying U, to calling him "Pink."
When he's fired from his bank job aimless Claude Bennett decides to head West. Once he gets a job as a cowboy on the Flying "U" ranch he restyles himself as Chip and discovers who he really is through a series of adventures.
Rancher Bill Holt has a small homestead and insists on holding onto his land, much to the chagrin of crotchety old Judd Acker, a neighboring rancher who would like to see him vacate.
Henry Weatherby is buying up ranch land to sell as right of way for a new road. When he sends his son Dick and his nephew Pete to kick the Wayne's off their ranch, Dick rebels and joins the Wayne's in their fight against his father.
Dynamite -- Universal's answer to Warner Bros.' canine star Rin Tin Tin -- and his owner Jerry Matthews (Edmund Cobb) come to the aid of a beleaguered rancher in this typical low-budget "doggie melodrama" set in the West.