The Warring States period was full of ups and downs, and demons were rampant. He was the current ruler of the Western Kingdom, the ruthless overlord of the world, and she was the subjugated princess of the Eastern Kingdom, a sad avenger. They met but did not know each other, they fell in love but could not stay together, they met but had no chance to cherish each other, they met but always had doubts about each other, and the love and hate in the three generations of love turned into helpless sighs...