After finishing her studies at a secluded convent school, Una, the daughter of the impressionist artist Julius Thoreau, comes to her father in Paris - and is horrified to learn that he has died. A naive, inexperienced girl finds herself completely alone in bohemian Montmartre, but Duke Blaise Wolstanton, a socialite and famous philanthropist who came to Paris to take a break from the whims of his frivolous mistress, decides to take part in her fate...