Bourvil plays the role of Antoine Marechal, a seemingly witless insurance salesman, who on his way to a vacation in Italy in his "deux cheveaux" automobile gets hit and has his car literally destroyed by the Rolls Royce of Leopold Saroyan, an affluent industrialist played by Louis de Funes. In order to make amends, Saroyan offers to have Marechal complete his trip to Italy in his convertible Cadillac (replete with a mobile phone and phonograph player - this is no less than twenty years before the advent of cellular phones and CD players). What Marechal doesn't know is that the Cadillac is also laden with stolen jewelry and drugs to be smuggled unwittingly by him across the border. What's more, Saroyan and two cronies as well as a smattering of other criminals tail Marechal during his journey across Italy and try to intercept or recharge, as the case may be, the merchandise on board the Cadillac. The hi-jinks in this movie are incredibly funny. This film is a worthy precursor to de Funes' "The Adventures of Rabbi Jacob."