When then famed Paris Opera finds new owners, they are full of enthusiasm for their star "Carlotta" (Mary Fabian) whom they know will wow the audiences. Both she and they, though, get a letter informing them that should she take the stage instead of her understudy "Christine" (Mary Philbin) then they'll all rue the day. Nobody pays a blind bit of notice and, well, the audience really do bring the house down! Using the enchantment of his voice, and promises of success, the "Phantom" (Lon Chaney) manages to lure the young "Christine" to his lair some five floors beneath the stage where he declar...