Behind the scenes of the Paris Opera, a mysterious phantom roams unnoticed, designing to provide a leading role for his personal favourite, the young singer Christine. He terrorizes to the point that Christine is indeed allowed to sing the coveted soprano part. But the phantom cannot win over her heart, which soon belongs to the noble Raoul. As the mutual affection of the masked pair becomes clear, the phantom finally abducts the young talent into the circuitous catacombs of the building.