Li Qingwan's life was a tragedy of being bought and sold, until Bai Lian taught her "rebirth": not salvation, but polishing her into a weapon to assassinate Emperor Jiaqing. She entered the palace with poisonous tenderness, but through repeated contacts, she glimpsed the warmth behind the emperor's mask - he would stay up all night to provide disaster relief for the refugees, and he would denounce the officials for corruption.
Love grows wildly between "killing and not killing". When the White Lotus Sect's butcher knife is about to be aimed at the person she loves, she finally chooses to betray everything and use her own life in exchange for the safety of Emperor Jiaqing.