Americans Zully Moreno and her daughter, Christine Kaufmann, are in Majorca, where they're hunting up a husband for the younger woman. Miss Moreno's criteria are simple. All she wants in a son-in-law is a title and lots of money. Miss Kaufmann wants love. She thinks she may have found it with an indigent investigative reporter. But from a small but wealthy principality comes Dieter Borsche. He represent the industrialist of his country, and thinks Miss Moreno's husband may have been the country's prince, run away for a real life. Now he's dead. Even if he wasn't Miss Kaufmann's father, he doesn't care that much.
It's based on a play by Jose Lopez Rubio, and it's all gingerbread and isn't-it-tough-being-rich-and-royal, a popular genre that appealed to the rich and royal. Since they were usually the patrons of the theater, it continued for many centuries. Miss Kaufmann, all of 15 when this came out, is fine, but it's Grand Duchesss Josefina Diaz de Artigas who provides the necessary vinegar that prevents this from being a boring fairy tale.