Samantha, Darrin and Endora are on their way to Salem, Massachusetts to attend the witches' convocation. The journey is filled with misadventure due largely to the differences between Darrin and Endora's preferred mode of travel. Samantha and Darrin have time before the convocation to act the tourist, they visiting a historical home turned into a museum. There, Samantha is confronted by an old fashioned "alive" bed warmer that will not leave her alone. Because the bed warmer seemingly has a mind of its own and because of where it is located, Samantha is certain that it is a witch or more likely a warlock who has been trapped into being what is supposed to be this inanimate object since the Salem witch hunts. What's worse for Samantha and Darrin is that the bed warmer follows them out of the museum back to their hotel. Samantha has to discover who the bed warmer is and why he was turned into a bed warmer before the police and museum officials arrive to arrest them for theft, they who are hot on Samantha and Darrin's tails.
—Huggo