The story takes place at the Paris Opera around 1880: The young singer Christine is achieving success there. She owes this to her singing teacher Erik, a mysterious man. Why is Christine not allowed to see his face? And why is Erik so jealous of her lover Raoul? Christine cries out: "It hurts, Erik. Please set me free!" Shortly after, she hears Erik's voice: "I will set you free, Christine," he says. "I will let you go. But remember: If you do not choose me, then we will all die." This well-known horror novel is also the basis for a successful musical.