Aaron Matthews, a brilliant psychologist, has turned his talents away from curing patients to far deadlier goals. He's targeted Tate, Tate's ex-wife, Bett, and their estranged daughter, Megan, for unspeakable revenge. Matthews, ruthless and hell-bent, will destroy anything that inhibits his plans. When their daughter disappears, Tate and Bett reunite in a desperate, heart-pounding attempt to find her and to stop Matthews, a psychopath whose gift of a glib tongue and talent for coercion are as dangerous as knives and guns.