Buffalo hunter O'Brien is settling down to a more civilized life in Fort Revenge, in Indian Territory, helping his friend run a stage line there. However, it isn't long before trouble comes from two in the form of an outlaw gang from Tulsa who want to buy his friend's stagecoach company and won't take no for an answer, and from a family of killers who are seeking revenge for the death of their kin at his hands. O'Brien must respond to these challenges with his own brand of gunsmoke...