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Evil magician Hoo Doo (Charles Nelson Reilly) falls victim to amnesia, imagining himself to be the prim-and-proper English butler to the Bad Hats. This situation provides a golden opportunity for the Good Hats in their efforts to help Mark (Butch Patrick) escape Lidsville and return to his own world. With Nursie, Madame Ring-a-Ding, and Granny Wheels leading the pack, Mark's friends endeavor to get their hands on Hoo Doo's flying Hatamarand before their perennial nemesis comes to his senses.