Bronco working for the Army Engineers finds himself involved in trying to move one last settler out of a basin that is to be flooded to make a lake. The man and his granddaughter start a worldwide riot when a reporter tells their story.
Bronco has been requested to transport a prisoner to Santa Fe for trial for robbery and murder while a decoy goes on the stage. He loses sealed instructions for an emergency which occurs when a victim's relatives attack them.
Deputy U.S. Marshal Bronco is asked to go with two marshals to Canada to identify a wanted man - his commanding officer in the war. In Canada they meet with the RCMP who help find the man. However, questions arise about his two partners.
In order to find the outlaws who framed him for murder, Bronco fakes his own death and takes the identity of a colonist. He joins a steamboat of other settlers one of whom nearly exposes him until she realizes he might be innocent.
Bronco is to lead a group of wagons into Mexico with farm implements as a cover for $1,000,000 in gold to support the Mexicans against the French. He has recruited a group of reconstructed rebels for the trip and there are surprises.
When Bronco comes back to his home town after having fought for the South 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.
Bronco accompanies a corpse for $25 by train to Denver. On the same train is a friend escorting $100,000 plus a pretty blonde. At the end of the trip he finds himself in jail for stealing the money and then forced to find it by two men.
A young woman who claims to be writing an article on western ghost towns hires Bronco as a guide to a ghost town he knows. When they arrive, he finds himself surrounded by men from the town wanting revenge for his work during the war.
U.S. Deputy Marshal Bronco who knows Jesse James from the Civil War is given the task of finding him. Bronco tries to convince Cole Younger, a member of the infamous James gang, to turn over Jesse James, who is a heartless killer.
A stranded and isolated Bronco is hired by an army officer who rescues Bronco to take him to Sitting Bull's camp, where he has a request to make of the Indian leader. He is under orders to recover a payroll stolen by the Sioux in a raid.
