The Indian Territory, 1879--Two men are on a collision course. Bass Reeves, who wears a deputy marshal's star, has sworn to uphold the law. The other is Marion Michael Donovan, a ruthless killer who murdered his first man at age fourteen. In the Indian Territories to investigate a group of white men selling guns to the Indians, Reeves enlists the help of an Indian deputy, Walks as Bear. Donovan has taken over the town of Temptation and, using a stolen Gatling gun, plans to rob a train carrying a shipment of gold. After discovering that Donovan is responsible for the murder of some Texas Rangers, Reeves finds himself in a race against time to stop the killers and prevent another massacre.