Grace Vaccaro works as a mental health evaluator-if a person is a danger to self or others, she can request hospitalization. When a paranoid man she just released is found bludgeoned to death on the banks of the Snoqualmie River, Grace wonders if she should have done more to help him. When her neighbor is found dead in the same location, she suspects a connection.
Grace's search for answers leads her from a Seattle homeless encampment to the rainy forests of the Cascades. The results are never clear. A Mexican immigrant fears deportation and refuses to talk to the police. A Native American elder works to conceal the location of ancestral gravesites. And a pregnant woman Grace just evaluated is terrified. Are her statements delusional or does she have information leading to the murderer?
As Grace comes closer to the truth, her quiet home is invaded and she is the next target. She must face the killer alone and learn how far she will go to protect herself and others.