Libby Day was 7 years old when her mother and two sisters were brutally killed in their home and she narrowly escaped. At the time, Libby testified against her brother Ben and he is serving a life sentence in prison for the grisly murders and is thought to have been in a satanic cult. Now, 25 years later, Libby meets with a group that firmly believes in Ben's innocence. She reluctantly begins to revisit the horrible murders and try to find the real killer. Flynn alternates chapters from Libby in present day, to Ben on the day of the murders, and Ben's mom, Patty, on the day of the murders. The narrative of the day of the murder begins in the early morning and chronologically goes through the day. At the same time, the chapter's told in the present day from Libby slowly uncover inconsistencies and clues to what really happened. What an inventive and interesting way to tell a mystery! There are parts of this book that are very gruesome and troubling so it is not for the sqeamish. But, if you like a page turner, I recommend this.