James Stewart rides the vengeance trail as he comes to a dusty New Mexico town in search of a gun runner whose wares were used by raiding Indians that led to his brother's death. Stewart is grim and determined in this beautifully filmed western to square matters with his unknown quarry and meets with hostility and indifference at every turn. The film has touches of extreme violence which was unusual for its time. The story is packed with suspense and tension as Stewart's Will Lockhart seeks his personal retribution. Along the way, Lockhart is befriended by a pretty girl and a strong-willed female rancher who are sympathetic to Lockhart's quest. Another sub plot has a cattle baron, his neurotic son, and a ranch foreman riding rough-shod over other ranchers and townspeople. Arthur Kennedy and Donald Crisp head a great cast of veteran western character actors, and a nod goes to Aline MacMahon for her portrayal of the plucky ranch woman.