In 1931 Berlin, young American Sally Bowles performs at the Kit Kat Klub. A new British arrival in the city, Brian Roberts, moves into the boarding house where Sally lives, and they become lovers. Sally befriends Maximilian von Heune, a rich playboy baron who takes her and Brian to his country estate; it becomes ambiguous which of the duo Max is seducing. After a sexual experience with Brian, Max loses interest in the two and departs for Argentina. During an argument, when Sally tells Brian that she has been having sex with Max, Brian reveals that he has as well. Sally learns that she is pregnant, but is unsure of the father. Brian offers to marry her and take her back to Cambridge. At first they celebrate their resolution to start this new life together, but after a picnic between Sally and Brian, in which Brian acts distant and uninterested, Sally starts to doubt continuing with the pregnancy and is disheartened by the vision of herself as a bored wife washing dirty diapers. Ultimately she has an abortion, paying for it with a fur coat and without informing Brian in advance. When he confronts her, she shares her fears, and the two reach an understanding. Brian departs for England, and Sally continues her life in Berlin, embedding herself in the Kit Kat Klub.
[Summary via Wikipedia]