When 24-year-old archival assistant Evangeline Sterling inherits a secluded coastal estate from a great-aunt she never met, she expects dusty books and family eccentricities. Instead, she finds a sealed envelope left specifically for her, to be opened only in the event of Beatrix Sterling’s "unnatural death."Beatrix predicted her own murder decades in advance and transformed her entire estate into a masterfully orchestrated puzzle. Locked inside the manor for forty-eight hours with a small group of suspicious locals—each with a motive and a secret—Eva must decrypt seven hidden clues scattered throughout the house to expose the killer before they strike again.