Teenage witch Marnie Piper has a mom (who doesn’t want her to carry on in the witch tradition), a grandma (Debbie Reynolds, who wants to take her on as an apprentice), and Kal (a cute guy hanging around who turns out to be the son of the family nemesis). When Marnie gets trapped by Kal in the dimension of Halloweentown, she and her troll friend Luke use time travel to escape; later they use a black-holeish “timeline” to get back to the present and save the day.