When Bronco comes back to his home town after having fought for the Confederacy in the Civil War, he finds that not only do many people in town consider him a traitor, but they also think he's a murderer who killed the brother of his fiancé.
Trouble brews when Bronco is leading a wagon train through the wilderness. It seems that an old army buddy of his is on the train, and he's brought along the runaway daughter of a powerful cattle rancher, who doesn't like it one bit.
Bronco arrives in a small town right after a stagecoach robbery in which a man has been killed. Suspicion immediately falls upon him, and what he doesn't know is that the robbery was actually committed by an old friend of his.
The outlaw Traxel brothers and gang leader Willis Turner murder Bronco's best friend and then frame him for the crime. He is sentenced to hang, and the only thing that can save him is the testimony of a young girl who knows that Bronco didn't do it--but she's a mute.
Outraged at becoming unwittingly involved in a payroll robbery and murder, Bronco sets out to find the killers and bring back the money. He doesn't have a whole lot of time, however. A posse is forming and they're going after who they believe to be the real killer--him.
Bronco is hired to deliver a riverboat to his friend Martha Chandler. He hasn't counted, though, on a ruthless businessman who doesn't want the ship to complete the trip, and a beautiful blonde passenger who has her own agenda.