Back at the Winterhouse Hotel for another holiday season, Elizabeth and Freddy dig deeper into the mystery surrounding Riley S. Granger, a hotel guest who left behind odd artifacts - one being a magical book that the evil Gracella Winters once attempted to use to gain destructive power over the entire Falls lineage. The two friends follow a trail of clues, inadvertently attracting the attention of a suspicious new hotel guest: Elana Vesper. The clock is ticking as Elizabeth and Freddy struggle to figure out whether Elana is merely a pawn or a player in the plot to revive the spirit of Gracella. If that wasn't enough, Elizabeth suspects she is coming into her own special powers - and she's fearful it might lead her right into Gracella's vicious web.