As spring arrives at Winterhouse, Elizabeth settles into the joyful chaos of her new home. But it isn't long before she and Freddy are drawn into an ominous new mystery. Guests at the hotel start behaving oddly, and Elizabeth's powers manifest in thrilling - sometimes frightening - new ways. As unnatural tremors shake the foundations of Winterhouse, Elizabeth hears cries for help from Gracella Winters - an enemy she'd thought dead and buried for good. The discovery of a rare book containing secrets of an ancient ritual leads to a tragic realization: Someone at Winterhouse is trying to help Gracella rise again. Danger, intrigue, and the power of family combine in this fast-paced trilogy conclusion.

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.