Scooby-Doo and Shaggy must go into the underworld ruled by the Goblin King in order to stop a mortal named The Amazing Krudsky who wants power and is a threat to their pals, Fred, Velma and Daphne.

A rock star babe and her hunky honey find themselves targeted by her psychotic ex, whose insane jealously sparks a deadly game of desert cat-and-mouse.

Restored to former glory, a nostalgic cruise ship repeats a tragic past...