Enter the future where it's Christmas day - every day. Except, that is, on the Mince Pie Isles where a group of rebel witches live in secret, illegally celebrating just once a year and practising their sprout-based magic passed down through an old spell book from Guardian to Guardian. Gryla Garland is a young witch who thinks it might be quite nice to celebrate Christmas every day, just like everyone else. But when the hapless and accident-prone young witch is unexpectedly chosen as the next Guardian of the spell book, she discovers that 24/7 Christmas - governed by a tyrannical Santa - isn't all it's cracked up to be. Now she just has to think of a way to change it back.