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....
After awakening in a mental asylum| a patient plans an escape to freedom| but finds an even more disturbing| supernatural world on the outside| one that threatens to
keep him trapped in madness fore...