It is 1956 and The Prince and the Showgirl is being made at Pinewood Studios in London, directed by and starring Laurence Olivier, who has recruited one of the biggest Hollywood stars of all time, Marilyn Monroe, to co-star with him. Colin Clark, a junior assistant on the production, is assigned the job of looking after Marilyn and keeps a journal about the week he spent with her. It proves to be a turbulent experience as Marilyn is going through marital problems with her husband and uses Colin as a much-needed sounding board for all her pent-up neurosis. Acclaimed drama from BBC Films based on Clark's real-life diaries.