Two kids find a haunted opera score capable of raising the dead!

When Lewis Barnavelt and Rose Rita Pottinger explore an abandoned theater, they discover an unpublished opera score entitled "The Day of Doom". Ignoring a strange omen, they show it to their music teacher, who heralds "The Day of Doom" as a masterpiece. Little do they know that the eerie Henry Vanderhelm, the composer's grandson, arrives - with a plan. A plan to awaken the dead and enslave the world!