Shaggy and Scooby and friends must return 13 ghosts to a magic chest which they inadvertently released.

Scooby and Shaggy are tricked by ghosts Bogle and Wierd into opening a chest of demons. With the aide of Daphne, Scrappy, an orphan named Flim Flam and warlock Vincent Van Ghoul, they have to return the 13 demons to the chest.—Television Junkie