"Sheriff Walt Longmire and Dog are called on a routine search and rescue to Wyoming's Bighorn Mountains, where Walt finds himself remembering when his father told about the first time he saw a man die. In the late forties, Bill Sutherland was shot but the investigation was stymied because no member of the elk camp where he was found was carrying the caliber rifle that killed the state accountant. When Dog discovers the missing weapon, the sheriff in plunged into a cold case. In his pursuit of the truth, he discover the rifle belonged to none other than Walt's infamous and uncompromising grandfather, Lloyd Longmire"--