Reindeer Games Christmas Tree Farm is going into the B&B business, and Holly White is looking forward to her new role as innkeeper. Even better, Mistletoe, Maine's sheriff, Evan Gray, has deputized his little sister Libby to help Holly wrap presents for Mistletoe's toy drive. But a cold wind ruffles the cheery holiday decorations when a new guest checks in: Karen, a vicious B&B critic, who could make or break the new inn. And the short December days turn even darker when Evan and Libby find Karen's dead body in the gift-wrapped toy donation box.

The suspect list is longer than Santa's naughty list, and local resident Cookie is on it, since her fingerprints are all over the murder weapon, a metal nutcracker that she gave to Holly. So is Libby, who recently moved to town from Boston in less-than-savory circumstances. But cranky Karen was an oh-holy-nightmare to lots of the townsfolk, such as Evan's reporter friend Ray; Christopher, the inn's former contractor; and confectioner Bonnie, whose Gum Drop Shop was a direct target of Karen's scathing prose.

To figure out the killer's identity and clear Cookie's name, Holly and her friends brainstorm at the Hearth, the farm's café, while her mother keeps them fueled with Christmas goodies fresh from the oven. But if they can't put the culprit on ice, Holly may never see another Christmas.