Scooby-Doo and the Witch's Ghost

When world-famous horror writer Ben Ravencroft tracks down the Mystery Inc. team to figure out why a ghost has decided to haunt his hometown's popular Autumn Harvest festival, suspicious spirits are only the beginning! Before long, Scooby, Shaggy, Velma, Daphne and Fred find themselves delving dangerously deep into Ravencroft's family secrets. Was his beloved ancestor Sarah a kindhearted healer, or an evil witch whose legacy now threatens the town...and maybe even the world? (official distributor synopsis)