Set in the Jazz Age on Long Island, the novel depicts narrator Nick Carraway's interactions with mysterious millionaire Jay Gatsby and Gatsby's obsession to reunite with his former lover, the descendant of a wealthy family, Daisy Buchanan. The story is known for its vivid portrayal of the American Dream, social class, and the disillusionment of the wealthy in the post-World War I era. Gatsby's lavish parties and opulent lifestyle are a stark contrast to the moral decay and superficiality that underpin the Roaring Twenties.