A restless wanderer is bound by a promise to watch after the widow of a dying friend. His vow leads him to a small town terrorized by a saloon owner and his hired gunman.

Monte Walsh and his friends are cowboys and bronco busters, plying their trade in the Wyoming Territory of 1892. The advancement of civilization has all but rendered Monte obsolete, but Monte doesn't want to change his ways. But with the corporate buy-ups of Wyoming land, Monte and his friends may be forced to move on.