Chance Torn, U.S. Marshal based in San Francisco, is mixed up in the middle of a tough cattle rustling situation in the middle of Texas. He was assigned it due to his growing up on a cattle ranch. He had to fake it as an out of work cowhand and try to get hired on by the rustlers who seemed to be short handed. He got hired, and helped them rustle another three hundred head of market ready steers to go along with two hundred they had before. His big problem was how to stop this trail drive to the railroad cattle pens without getting himself shot full of holes by the twelve other riders and trail boss on the drive.