Over a thousand years ago, the great kingdom of China was under constant threat of invasion by powerful tribes and warring states along its rugged western border. For generations, one fiercely-patriotic clan of warriors -- the "Yang" -- battled bravely in the nation's defense. The widows of the clan pleaded with the Emperor, whose own court had become weakened by corruption and greed, to send reinforcements. But none came. Soon, the last remaining...