"Alan" (Ian Bannen) is a Scotsman on holiday in Italy when he has a bit of a barny with his girlfriend "Shiela" (Vanessa Redgrave) and strops off in the company of the enigmatic and wealthy "Anna" (Jeanne Moreau). She is busy searching for a sailor she knew decades ago, and with virtually no chance of ever finding him the two set off on her luxury yacht on their nautical wild goose chase. It's on this boat that they encounter the larger than life "Louis" (Orson Welles) who suggests to "Alan" that all may not be right with his friend. Indeed, he - like we may have already considered - wonders if...