In the shadow of World War One and set against the backdrop of the Roaring Twenties, "The Great Gatsby" is F. Scott Fitzgerald's magnum opus. In it, he explores the themes of decadence, idealism, social class, and the mystery of human identity. The story takes place on Long Island, near New York City, and depicts first-person narrator Nick Carraway's interactions with mysterious millionaire Jay Gatsby and Gatsby's obsession to reunite with his former lover, Daisy Buchanan.