She is beautiful, and her smile is alluring, but she has not been able to smile since more than ten years ago. She always covers her face, wears elegant white clothes, and is a fairy lost in the mortal world. The ruler's medical skills were superb, and his martial arts were not inferior to those of Sai Huatuo. But she has a rule: she will not save foreigners; she will not save those who are displeased; she will not save those who are unfaithful and unjust. He made her break these rules. He was a ruthless killer, but he fell in love with her unknowingly...