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 Molly's security parrot practicing Kung Fu? Who switched on the light in the tower at the long abandoned Hags Hall? Who stole Bony Bob's mum's arm bone? Who is Myrtle Moonseed? For the answer to these and other puzzling, head scratching questions, join Molly and her friends in her creepiest, most exciting adventure yet.