After serving 12 years behind bars for armed robbery, tough guy Hank McCain finds himself the pawn of a ruthless mob runt’s rebellion against a high level don. When McCain discovers that he’s been betrayed and abandoned by his new employer, he retaliates with a high stakes Las Vegas casino heist that erupts into all-out war on the streets of Los Angeles, San Francisco and New York. Not blood, nor lust, nor wedding vows can come between McCain and his money…or his machine gun.

After being dumped by his fiancée, hard-drinking and depressed Mark Cormack (John Payne) loses his job in the Los Angeles district attorney’s office and serves as bouncer in a Las Vegas casino. A wheelchair-using stranger Barzland (Francis L. Sullivan) hires him to locate a ruby that disappeared in a Caribbean plane crash. He lures Cormack into doing the job by telling him it may be in the possession of the very woman who jilted him. The ex-detective flies to remote island Santo Rosario to find the stone and investigate the mystery. When he finds his old flame he finds that her husband is in prison. Cormack, again falling for Janet, is convinced into helping him break out of jail. But Janet has other plans.