Falsettos is a sung-through musical with a book by William Finn and James Lapine, and music and lyrics by Finn. The musical consists of March of the Falsettos (1981) and Falsettoland (1990), the last two installments in a trio of one-act musicals that premiered off-Broadway (the first was In Trousers). The story centers on Marvin, who has left his wife to be with a male lover, Whizzer, and struggles to keep his family together. Much of the first act explores the impact his relationship with Whizzer has had on his family. The second act explores family dynamics that evolve as he and his wife plan his son's bar mitzvah. Central to the musical are the themes of Jewish identity, gender roles, and gay life in the late 1970s and early 1980s. It also deals with the topic of the AIDS epidemic.