South of Sonora (1930)

Bill Tracy is a Cattlemans 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 Blackies 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 Carters foreman is the leader of the rustlers