When violence from the drug wars with the Mexican cartels crosses the border into Arizona, and an old friend is murdered, Ali Reynolds steps in to investigate. When Santa Cruz county deputy sheriff Jose Reyes, one of Ali Reynolds’s classmates from the Arizona Police Academy, is gunned down and left to die, he is at first assumed to be an innocent victim of the drug wars escalating across the border. But the crime scene investigation shows there’s much more to it than that, and soon he and his pregnant wife, Teresa, are both under suspicion.