Carol is a romantic drama film based on the novel The Price of Salt by Patricia Highsmith. Sarah Paulson has a supporting role in the film, playing Abby Gerhard, a close friend of the main character, Carol. The film explores the forbidden love between Carol, a wealthy woman going through a divorce, and Therese, a young photographer. Paulson's performance adds depth to the story, portraying a loyal and supportive friend who understands the complexities of Carol's situation.