Rose Rita Pottinger and Mrs. Zimmermann are transported back to 1828 to save the Weiss family from being destroyed by a wicked wizard.

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When Lewis Barnavelt and Rose Rita Pottinger explore an abandoned theater, they discover an unpublished opera score entitled “The Day of Doom”.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,...

When Lewis, his uncle Jonathan, and their friends Rose Rita Pottinger and Mrs. Zimmermann take a trip to a small town near Lake Superior, they expect a pleasant vacation. Instead, they find themselves facing the ghastly Ishmael Izard, son of the fiendish creator of the Doomsday Clock that was once hidden in the walls of Uncle Jonathan's house. Ishmael himself is a cruel and heartless sorcerer, and he is determined to wreak vengeance upon the entire...

"A boy goes to live with his magician uncle in a mansion that has a clock hidden in the walls which is ticking off the minutes until doomsday." --

Twelve-year-old Lewis and his best friend Rose Rita investigate a strange old house in their home town and discover that they may be dealing with powerful ancient Hawaiian spirits.

When the evil sorceress Belle Frisson ensnares Rose Rita Pottinger in a magic web in order to steal her life force, Lewis Barnavelt must risk his own life to save his friend.