Murders old and new disturb the peace of Tohono O'odham Nation residents and their Arizona neighbors in this fourth entry in Jance's Walker Family series. Californian Jonathan Southard is so seething with resentment that he kills his wife and children and goes after his remarried mother in Tucson. Reverberations from Southard's crimes touch the former sheriff Brandon Walker, his wife, Diana, and their adopted Native American daughter, Lani, exacerbating old wounds at a time when Walker is worried about Diana's mental health.