Don Giuliano Niccolini Borges (Vittorio Gassman), Roman Prince and member of the Pontifical Noble Guard, is very much attracted to Jane (Dame Joan Collins), an English girl he has met that is accompanying him on a pleasure trip to Switzerland. He has some plans for hanky-panky on their various stops along the route, but Jane has other plans, as she is only with him because his car has a special-identification license plate and can go through customs without inspection. The car clears customs as does the stolen million dollars she is smuggling. Sandro (Jacques Bergerac), her former boyfriend is following and plans to hijack the loot, leaving Jane empty-handed.