Inspired by a true story, former P.O.W. Jack Calgrove moves Heaven and Earth to be reunited with his children following the Civil War. After returning home, Jack finds out his wife has died and his children, presumed orphans, are heading deep into the West aboard a train bound for hostile territories. Calgrove and another former soldier are joined by a troop of Native American sharpshooters and a freed slave, as they race to intercept the orphan train...