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 directions: 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...