When Lewis and Rose Rita explore an abandoned theatre, they discover an unpublished opera score entitled 'The Day of Doom'.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' a masterpiece. Little do they know that the eerie Henry Vanderhelm, the composer's grandson, arrives with a plan to awaken the dead and enslave the world!

Soon, all the adults are enamoured - and enspelled - by Henry Vanderhelm. A mysterious fog descends upon New Zebedee and everyone is trapped inside it. It is up to Lewis and Rose Rita to stop the dead coming back to life.

For fans of Goosebumps.