During a picnic in the park, Scooby-Doo and the gang go on a search for a buried treasure that is guarded by the ghost of a pirate, but what they actually find is something completely different.
While at a farm picking vegetables for Thanksgiving dinner, Daphne, Velma, and Fred are turned into pumpkin-headed monsters and Scooby and Shaggy must help them.
Scooby-Doo, Shaggy, and the gang investigate the mysterious happenings thought to be the work of a ghost when they visit Velma's Aunt Meg in Banning Junction for Halloween.