Career-driven assistant district attorney Nina Frost knows the guilt familiar to all parents torn by the demands of home and office. But whereas most parents imagine the dangers that can befall their children. Nina witnesses them firsthand. She prosecutes child molesters and she has seen too many criminals slip through the system and walk free. Nina's husband, Caleb, is a stonemason, a methodical man who glories in his ability to construct physical barriers. But even the strongest walls cannot guard Nina and Caleb from the shattering discovery that their own beloved son has been sexually abused. Five-year-old Nathaniel is the only one who knows the identity of his assailant but the trauma has left him mute. Knowing the futility of trusting the courts to exact justice for Nathaniel, Nina finds herself in a grip of rage she can't deny no matter the consequence, whatever the sacrifice.