Vier Fäuste gegen Rio

Die überaus reichen Vettern Sebastiano und Antonio aus Rio wollen das Geschäft ihres Lebens machen, fürchten allerdings um ihr Leben, denn die Konkurrenz geht über Leichen. Also engagieren die versnobten Geschäftsmänner den Stuntman Elliot und den Jazz-Saxophonisten Greg, die ihnen zum Verwechseln ähnlich sehen. Die finden jedoch schnell Gefallen am Jet-Set-Leben und sehen gar nicht ein, dass sie auf ihren neu erworbenen Reichtum wieder verzichten sollen. Die zwei Gauner Terence und Bud doubeln für eine Million Dollar zwei Geschäftsleute.

Billionaire cousins Bastiano (Terence Hill) and Antonio (Bud Spencer) are two savvy businessmen, at least in one regard. They want to close a large deal, although they have to fear for their lives because of it since their competition won't even stop at murder. Therefore they have an agency find two look-alikes from the United States, stuntman Elliot Vance (Terence Hill) and the jazz saxophonist Greg Wonder (Bud Spencer). These accept the job offer, initially not knowing why they really have been hired. Nonetheless Elliot and Greg manage to fight their way through all kinds of situations without too much trouble. Additionally they quickly come to like the jet-set life. The resulting damage to their reputation provokes the Coimbras to return to Rio ahead of time. This puts them right into the sights of their enemies, alongside the cousins' look-alikes.