The Phantom of the Opera is a musical with music by Andrew Lloyd Webber and lyrics by Charles Hart. Richard Stilgoe and Lloyd Webber wrote the musical's book together. Stilgoe also provided additional lyrics. Based on the French novel of the same name by Gaston Leroux, its central plot revolves around a beautiful soprano, Christine Daaé, who becomes the obsession of a mysterious, disfigured musical genius living in the subterranean labyrinth beneath the Paris Opéra House.