Plot
In 1880, Rafe Covington is with his best friend Charles Rodney on a vessel bound for San Francisco. Rodney is dying, having been severely beaten by the ship's captain. With his last breaths, Rodney makes Covington swear an oath to take care of his beloved Wyoming ranch and his wife, Anne. After beating the captain to avenge Rodney's death, Covington and his two other friends, Rock Mullane and J.T. Langston, head off to Wyoming. After a long trek through the Rocky Mountains, they find the ranch long deserted and immediately set to work restoring it.
Covington heads into the local town to pick up supplies. He finds Anne and informs her of what happened, but she refuses to believe him, as it's been accepted that Rodney was killed by a Sioux war party a year previously. Anne is also being wooed by wealthy businessman Bruce Barkow, who essentially runs the town and secretly desires the ranch for his own purposes.
Covington befriends Joe Gill, an older cowboy who was a good friend of Rodney's. Covington then rescues local Souix chief Red Cloud's daughter from the clutches of Mike Taggart, one of Barkow's hired men; Mike, his brother Luke, and their friend Snake Corville all become hostile to Covington in response. Covington and his friends also round up Rodney's scattered cattle and get the ranch going again, angering Barkow. Covington tries to convince Anne that he was there when Rodney died, and is there to look after her and the ranch, but she repeatedly refuses to believe him. Simultaneously, Barkow attempts to convince Anne that Covington is only interested in the ranch for himself.
One day, Covington, Rock, J.T., and Gill head into town for a drink, and Covington purchases a new Winchester Centennial rifle that was special ordered for Rodney. Outside, an inebriated Mike challenges Covington to a duel. Covington tries to walk away, but when Mike draws his pistol and shoots, Covington returns fire with the rifle and kills him. Snake then attempts to ambush Covington from atop one of the buildings, but Covington notices and guns him down too. With the stakes now raised, Barkow sends for Beau Dorn, an infamous gunfighter with an impeccable reputation.
The next day, Covington, Gill, Rock, and J.T. discover large volumes of petroleum oil on the ranch. When they arrive back at the ranch house, they find Barkow there with his thugs. Barkow gives Covington three days to clear out with J.T. and Rock, or else he will have Dorn force them out. He offers Gill the chance to stay, but Gill openly sides with Covington. Dorn arrives in town and meets with Barkow; he agrees to kill Covington and his friends in exchange for a piece of the ranch for himself. That night, Barkow officially proposes marriage to Anne, but she neither accepts nor rejects his proposal.
When the three days run out, Barkow sends Dorn to the ranch, where he perches atop a hill with a sniper rifle. Anne also rides out to the ranch and Covington shows her the pits of petroleum oil. Finally realizing Barkow's true intentions, Anne tells Covington she believes him and they kiss. Dorn opens fire with his rifle from afar, shooting J.T. in the heart and killing him. Barkow's thugs then steal Rodney's cattle and herd them into town. When Anne rides in and tells Barkow she believes Covington, he angrily beats her and forces the town's cowardly sheriff to marry them in front of the townspeople, thereby giving him legal control over the ranch. Barkow then attempts to rape Anne in a hotel room, knocking her unconscious when she fights back.
Covington, Rock, and Gill hold a funeral for J.T., then load up their guns and ride into town to confront Barkow and Dorn. A furious gunfight ensues as Rock, Gill, and the town's general store owner take on Barkow and his thugs. Even though Gill and the store owner are both shot and wounded, all of Barkow's men are gunned down, with Rock killing Luke by emptying his rifle into him. Meanwhile, Covington engages Dorn in a one-on-one shootout. Dorn shoots Covington in the shoulder, but Covington plays dead and then shoots Dorn in the ankle and chest when he looks away. Dorn slowly dies, and Covington holsters his weapon, only to be shot and wounded in the back by Barkow. Just as Barkow prepares to finish off Covington, Anne arrives and shoots him dead with Covington's rifle. With the battle over, the townspeople emerge from the buildings as Covington, Anne, Gill, and Rock reunite.
