In this Halloween Special, Molly Miggins has been given a new task by Granny Whitewand and the Rickety Brooms coven. She must solve the mystery of Halloween Hattie, a ghost witch who appears on a swing in the graveyard every Halloween at eleven o'clock. Molly teams up with the scaredy-cat ghost, Bartholomew P. Balderdash, a walking-talking skeleton called Bony Bob, and an ex-vampire doctor called Count Von Docula to try to solve the mystery. Why is...