Hannah Monroe's boyfriend, Matt, is gone. His belongings have disappeared from their house. Every call she ever made to him, every text she ever sent, every photo of him and any sign of him on social media have vanished. It's as though their last four years together never happened. As Hannah struggles to get through the next few days, with humiliation and recriminations whirring through her head, she knows that she'll do whatever it takes to find him again and get answers. But as soon as her search starts, she realizes she is being led into a maze of madness and obsession. Step by suspenseful step, Hannah discovers her only way out is to come face to face with the shocking truth.