It's the week before Thanksgiving, and Merry Wilkinson, owner of Mrs. Claus's Treasures, is preparing for a weekend reunion of her mother's college friends. But when the group of women comes into Merry's shop, Merry is met with frosty attitudes and cold hearts.

The women argue amongst themselves constantly, and the bickering only intensifies after one of the friends is poisoned. With her father's role as Santa in danger due to his proximity to the crime, Merry will need to use all of her investigative gifts to wrap this mystery up and save Santa and her favorite holiday.