An unsolved mystery of missing sisters and one returns unharmed a few years later. The story is told by Cass, one of the sister and Abby the forensic specialist that was assigned to the case. We learn about Cass and Emma through the past POV and the present with Cass and Abby's POV. I loved how the story unraveled and my heart broke for Cass and Emma with their dysfunctional family. I their mom is one of the most hated character I have read.