Desc: Border Roundup: Directed by Sam Newfield. With George Houston, Al St. John, Dennis Moore, Patricia Knox. In this 10th film of PRC's "Lone Rider" series, crooked banker Masters learns from rancher Jeff Sloane that he and his partner, Sourdough, have discovered a gold mine. Masters has his henchman Blackie and his gang, kill Sourdough and take Sloane a prisoner to force him to reveal the location of the gold strike. Masters tries to frame Smoky Moore for the murder, by planting on him the gun used in the murder by Indian Pete, but his pals Tom Cameron/The Lone Rider and Fuzzy Jones rescue him as the gang is taking him to the sheriff. After talking to Sloane's daughter, Amy, Tom is convinced that Masters is behind the killing and is also holding the old man a prisoner somewhere. He and his two pals set out to find and free Sloane and to also prove Masters' guilt.