Finals week is approaching and Mac is still undecided on where to spend the holidays. Normally she'd go home to Scotland, but spending two weeks alone in the castle with her dad isn't as appealing as it used to be. So she invites Carly, Lissa, Gillian, and Shani to join her for the holidays! Mac is determined to make this the best Christmas ever. She even decides to organize the traditional Hogmany dance for New Year's Eve. If she can get her mother involved in the dance, maybe her parents will finally get back together. But when Mac and the girls arrive in Scotland, they are faced with bad news: the castle is falling apart and Mac's parents are struggling financially. Not only that, but Shani is in big trouble with Prince Rashid's royal family. Can the girls find a way to celebrate the holidays, get Mac's parents back together, save the castle, and rescue Shani from her relentless pursuers? There's only one way to find out...