Two boxes of Marilyn Monroe's private writings were discovered in the home of her acting coach, 50 years after her death. Reading her letters onscreen by a star-studded cast, including Marisa Tomei, Glenn Close, Lindsay Lohan, Paul Giamatti, Elizabeth Banks, Uma Thurman, Viola Davis and Adrien Brody, this documentary sheds light on Monroe's personal life, creating a new understanding of this pop icon.