The Haunting of Hill House meets The Lovely Bones in this evocative and mind-bending psychological thriller following three teen girls solving a past treacherous murder. Nobody believes sixteen-year-old Lila Sadler, who was diagnosed with bipolar disorder, her sister is possessed by the ghost of Kate Watkins. As Rose's health worsens each day, the only way to save her is to uncover the awful truth of Katy's death so many years ago. And nobody knows what happened to Katy on October 31, 1925. Not even Katy. Unaware that she was murdered, Katy has wandered for a hundred years in complete ignorance, until the day she meets Rose and Lila. Together Lila, Rose, and Katy must confront their demons to escape. But first, they must forgive the unforgivable.