Ed Earl Burch, a cashiered Dallas murder cop, is a private detective facing the relentless onslaught of age, bad choices, guilt and regret. He's a man who longs for the clarity and sense of higher calling he felt when he carried the gold shield of a homicide detective. And he seeks redemption and a chance to make amends with an old woman he abandoned when she needed him most — to save her reckless granddaughter from drug addiction, sexual abandon and an abusive father with the money and malevolent power only a crime lord can wield. When Burch visits her decades later, she has the same request — save her granddaughter and bring her home for a final goodbye. That sends Burch back to West Texas on a mercy mission that plunges him into a violent world of gun-runners, cartel killers, crooked lawmen and anti-government extremists to fulfill a dying woman's last request.