"Reese Hartley has come to Wyoming to settle on his own land. But his cattleman boss expects his hired men to turn their homestead claims over to him. Hartley resists and is let go. He meets a woman named Muriel. She has come west to look for land, but her cousins want to exploit her. A cowboy is found dead on the range, and an underage female cousin of Muriel is found dead. This girl, Nancy, has a history of flirting, and suspicion falls on Hartley. After interviewing Nancy's father and an unsavory drunk, Hartley confirms that the perpetrator of the murders is a man who got Nancy pregnant. When the villain flees, the marshal and a small posse set out on a chase along bluffs and canyons, there to have the showdown. Hartley and Muriel make plans to take up homestead claims in an area called the Great Lonesome"--