In this 23rd entry in Monogram's 24-film "Range Buster" series, the ranchers around Winston are having their cattle stolen, for black market purposes, by a gang of rustler's using trailer trucks. The government sends Range Busters Crash, Denny and Alibi to investigate and put an end to this activity. Crash comes across the body of the federal agent who had sent for him and is accused by gang-member Slade of the murder, and is turned over to Sheriff Harley. Denny takes a job on the ranch owned by Fred Prescott, and immediately falls in love with Prescott's daughter, Linda. Alibi finally convinces the sheriff that Crash is a federal agent and the sheriff agrees to let Crash work, using the jail cell as his cover. Alibi learns that Corbin, respected citizen, is actually the gang leader, and also discovers the truck used to convey the cattle to the slaughter house. Crash, Denny and Alibi secrete themselves in the truck and accompany the gang to their next raid.