A vicious band of nuclear terrorists is threatening America's atomic weapons research. Truck jockey Charlie Morrison (Forrest Tucker) volunteers for a last-ditch, suicide scheme to lure them into a trap, baited with a vital shipment of bomb-grade plutonium. Soon, Charlie's high-balling it down a remote desert road with a small army of lethally equipped bandits zeroing in on him. Charlie's secret weapon? \"Big Thunder\", a 65-foot, 18-wheeled war wagon of merciless high-tech destruction!
The Indian called Copper Face is suspected to have stolen a large quantity of gold from a bank.
Wifes and children of the Mormon Orville Beecham become victims of a massacre in his own house. The police believes the crime had a religious motive. Orville doesn't give any comment on the case, is taken into protective custody. Journalist Smith persuades him to help him in the investigation - and finds out about economic motives for the murder.
At the end of the Civil War, Jim Slade, a young confederate soldier and conscientious objector, returns to his ranch to find his parents murdered and the ranch practically destroyed. He finds and kills three of the murderers and learns the name of the fourth, a certain Corbett. Finally he discovers Corbett as the leader of a gang that has plans to rob a local bank and is invited to help defend the town from the bandits. Teaming with a preacher, who has an agenda of his own, the two take a stand against Corbett.