Shane and Aimee Lancaster are faced with the darkest horror yet in the fourth installment of The Hollow series. An enemy they once fought could be their only hope, but how can they trust someone so dangerous? Meanwhile, Aimee reels from the discovery of a deep betrayal by the two people she loves the most, but she must rally with the very people who hurt her to save their lives—along with the lives of everyone else in Sleepy Hollow.