"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...

Allison Parker is on the run with her teenage daughter, Hannah, and Colter Shaw has been hired by her eccentric boss, entrepreneur Marty Harmon, to find and protect her. Though he's an expert at tracking missing persons--even those who don't wish to be found--Shaw has met his match in Allison, who brings all her skills as a brilliant engineer designing revolutionary technology to the game of evading detection. The reason for Allison's panicked flight...