In the quiet town of Eureka, Georgia, a woman is murdered. On that same night, Helen Tyler arrives in town. She's a kind, soft-spoken woman who owns a handgun and refuses to give out her telephone number. Matt Clevenger, the county sheriff, finds a white Bible on the end of the murdered woman's bed, and learns that another body was found in exactly the same way just two weeks earlier. With little more than this scant but bizarre evidence, Matt must uncover the secret identity of a killer. Helen Tyler must hide a secret past. Together, they embark on a terrifying journey that brings them ever closer to the answers to this deadly mystery, answers that will change both of their lives forever.