Raiders are terrorizing the buffalo range, wiping out hunters' camps and stealing skins. 'Notso' Wise, a former Texas Ranger, is recruited by a private detective agency to bring the thieves to justice. Doubts exist that the local lawmen are pursuing the raiders with sufficient vigour and Notso also doubts his ability to take the more subtle approach that the new job requires. The raiders are led by Jim Hardiman, a ruthless villain who uses a network of illegal informers backed by cold-blooded murder. It is not long before Notso attracts his attention. While running Hardiman's gang to earth, the detective draws on his ability to ride hard and shoot straight...