In this twisty thriller from the New York Times bestselling master of suspense, reward-seeker Colter Shaw infiltrates a sinister cult after learning that the only way to get somebody out . . . is to go in.

In the wilderness of Washington State, expert tracker Colter Shaw has located two young men accused of a terrible hate crime. But when his pursuit takes a shocking and tragic turn, Shaw becomes desperate to discover what went so horribly wrong and if he is to blame.

Shaw's search for answers leads him to a shadowy organization that bills itself as a grief support group. But is it truly it a community that consoles the bereaved? Or a dangerous cult with a growing body count?