When the body of a young Vietnamese woman is discovered alongside the interstate in Wyoming's Absaroka County, Sheriff Walt Longmire finds only one suspect, Virgil White Buffalo, a Crow with a troubling past. In waht begins as an open-and-shut case, Longmire gets a lot more than he bargained for when a photograph in the young woman's purse connects her to an investigation that longmire tackled forty years ago as a young Marine investigator in Vietnam. Book #4, 336 pages, soft cover. ISBN 9780143115526.