As a teenager, John McMasters won the Medal of Honor as a sniper for the Union Army during the Civil War. Thirty years later, McMasters lives a peaceful life in the Arizona Territory, raising a family and running cattle. These days, he needs eyeglasses to hit a distant target. But that doesn't stop his wife and four children from buying him a special present for his fiftieth birthday: a beautiful new Remington shotgun. Turns out, he's going to need...