British comedy drama linking the lives and stories of three very different people through their ownership of the same yellow Rolls Royce Phantom II. The first to own the car is Englishman Lord Charles Frinton (Rex Harrison), who buys it as a birthday present for his wife Lady Eloise Frinton (Jeanne Moreau). The car is then bought by gangster Paolo Maltese (George C Scott) to tour round Italy with his moll Mae Jenkins (Shirley MacLaine). In the middle of their journey, however, Paolo is called back to the United States to take care of business. In his absence Mae takes up with street photographer Stefano (Alain Delon) whom she falls in love with. The final purchase is by Gerda Millett (Ingrid Bergman), a wealthy American widow on her way to visit royalty in Yugoslavia during its invasion by the Nazi Germans in World War II...