When his older brother is killed in San Francisco while trying to rob an armored truck owned by Skorsky, Tony Vincenzo, a Las Vegas casino dealer, vows to honor his brother's memory by successfully executing the robbery. He seduces Anne, Skorsky's secretary and mistress, and learns from her the details of a shipment coming by van from the Las Vegas casino to a California bank. Tony and his gang waylay the truck in the Nevada desert, dispose of all but one guard, and attempt to cut through the van's steel plating with blowtorches. Unknown to Tony, Skorsky has been using his company as a cover for smuggling gold ingots into Mexico for the Mafia, and the operation has aroused the suspicion of Douglas, a federal treasury agent. Meanwhile, Tony's men begin fighting among themselves; and during the mayhem, the guard inside the van, who is actually a government agent, wounds Tony and locks him in the van before dying. Tony manages to open the truck by short-circuiting the electrical lock; he then telephones Anne to meet him. She arrives, followed by Douglas' team of treasury agents, as well as Skorsky and several Mafia members. At the same time, some of Tony's men return with explosives and set off a blast which kills them and scatters the contents of the truck across the desert. As the police move in to arrest the remaining conspirators, Tony breaks into laughter, satisfied that he has avenged his brother's death.