The rich cousins Antonio and Sebastiano Coimbra, business men from Rio/Brazil, live in fear... Killers are after them! To fool the killers, they search for "doubles". Greg Wonder (Bud), saxophone player with a criminal record, and Elliot Vance (Terence), a stunt man, are the spitting images of the Coimbras. To do the dangerous job, they're promised one million dollars each. Over night, Greg and Elliot turn into the millionaires... The housekeepers are totally confused: Suddenly, their fine masters show bad table manners and have an enormous appetite... The killer-gang gets the biggest shock of their lives. While Greg and Elliot enjoy their lives as millionaires and give a lot of food for the yellow press, the mysterious going-on's start to be uncovered. The in-house shrink might be part of the enemies and after a while, the head of the gang is discovered...