In order to stop a group of children from playing pranks out of boredom, Mister Peepers invites them in for a Halloween story, which includes a bad knight (Wes), a wicked witch brewing practical jokes (Mrs. Gurney), a queen (Marge), the queen's younger sister (Nancy), and the queen's best knight (Mr. Peepers).

Mrs. Gurney is appointed to represent Jefferson Jr. High at a teachers' convention in California, but can't decide whether to take the trip.