Dan Kincaid was a deputy sheriff in Colorado, but when his teenage sister was brutally murdered by outlaw Matt Barton, he quit his job and went after the killer. His search took him to the Texas Panhandle Diamond B ranch owned by Matt's father, Isaac Barton, who ran the ranch with his second son Ron. The Diamond B Ranch was a front, and from it, once a year, Matt Barton led a band of men to steal cattle passing along the Western Cattle Trail. Dan foiled the next operation. The three Bartons were caught and sentenced to hang, but the story had only just begun. Can Dan, now married with a young child, thwart the evil lust for revenge that now threatens him?