After posting a one-star review for a poorly written--but gruesome--horror novel, Emma Carpenter is dragged into an online argument with the author himself, but when disturbing incidents start happening at night, Emma digs into his life and work, discovering a sadistic man who is capable of anything.

"Lucy Barton is a writer, but her ex-husband, William, remains a hard man to read. 'William,' she confesses, 'has always been a mystery to me.' Another mystery is why the two have remained connected after all these years. They just are. So Lucy is both surprised and not surprised when William asks her to join him on a trip to investigate a recently uncovered family secret - one of those secrets that rearrange everything we think we know about the...