"Le Fantôme de l'Opéra" by Gaston Leroux is a Gothic horror novel first published in 1909-1910. Set in the Paris Opera House, the story follows mysterious events surrounding a disfigured figure known as the Phantom. When young soprano Christine Daaé captures his obsession, a dangerous love triangle emerges between Christine, the Phantom, and her childhood love Raoul. As the Phantom's demands grow darker and more desperate, lives hang in the balance beneath the opera house.