Nineteen-year-old Terron Vogel is living on borrowed time. Struck by a mysterious and deadly curse that promises to claim her life by her next birthday, she has become an outcast even within her own status-obsessed family. In a last-ditch effort to find a cure, the Vogels travel to the "Sable House," a secluded and magical holiday retreat known for its wealthy, eccentric guests and impossible secrets. Terron quickly realizes that the estate is more than just a resort—it is a place where shadows have life and every inhabitant is hiding a "Sable Curse" of their own. To survive, she must navigate the deadly etiquette of the house, unmask the enigmatic Mr. Sable, and find a way to break her spell before her time finally runs out.