Warner Bacon

With Mystery Inc. breaking up, Shaggy sets out to create a new team but when the gang uncovers an ancient chest that once opened, will unleash an ancient evil upon the world, they will need the help of a new mysterious friend who can send this creature back to where he came from, before the world is plunged into eternal darkness.

Following the events of Mystery Inc. II, we see where Shaggy and Scooby-Doo ended up following the separation of Mystery Incorporated.