Portuguese Brazilian billionaire cousins Bastiano (Terence Hill) and Antonio (Bud Spencer) Coimbra de la Coronilla y Azevedo are in fear for their lives after several assassination attempts. Therefore, they have an agency find two look-alikes, Stunt performer Elliot Vance (Terence Hill) and the saxophone-playing small-time criminal Greg Wonder (Bud Spencer), to temporarily take their place and find out who is behind the assassination attempts.