Bill Tracy is a Cattleman's Protective Association agent. Working undercover on his way to Sonora, a town dominated by rustlers, saves Betty Carter from a situation, but her rancher father, believing Blackie's suggestion that Bill is a rustler, forbids her to see him. Bill and his pal Heinie Schmaltz rescue each other from rustlers' various plots and ambushes and eventually discover that Blackie, Carter's foreman, is the leader of the rustlers.

Trained by his Quaker mother to be gentle, Cyril Henderson receives only laughter from the townspeople when he tries to act tough to impress Grace Nolan, who is allowing Art Jordan, the town bully, to occupy her time so as to pique Cyril. The murder of Andrew McBride, who holds the mortgage on the Henderson's property, is blamed on the elder Henderson, and Cyril unsuccessfully tries to take the blame.