A young woman, Lindy Smith (Yolande Donlan), is surprised to discover she has inherited a vast fortune and a small European State from a distant relative. She sets off to take up her position as Princess but meanwhile has received none of her fortune. Then a young man, Tony (Dirk Bogarde), offers to help her market a local product throughout Europe to stave off the country’s bankruptcy. The plan is a success until other nations fear for their own industries and prohibit it. So the local folk decide to indulge in their favorite pastime - smuggling! When she legalizes it, all becomes even rosier, not only for the locals but for the romance blossoming between her and Tony.