During Marilyn Monroe's first trip to London to film The Prince and the Showgirl with Sir Laurence Olivier, she befriends Colin Clark, the 23-year-old Third Assistant Director on the set. As their relationship progresses, Colin's focus shifts from making his way in the film business to rescuing her from the pressures of celebrity life. When Monroe's new husband makes a brief trip to Paris, Clark takes the opportunity to introduce her to the world outside of Hollywood fame.