The Doom of the Haunted Opera

When Lewis Barnavelt and Rose Rita Pottinger stumble upon a haunted opera score called "The Day of Doom" in an abandoned theater, they unwittingly unleash a sinister plan from Henry Vanderhelm, the vengeful grandson of the composer. As their music teacher praises the score as a masterpiece, ominous events unfold, leading to a dangerous confrontation with a dark force intent on raising the dead and claiming power over the world.