Xie Yunzhao, a noblewoman from a powerful family, is betrayed by her husband, Prince Jing, and her cousin, Su Yuntang. Poisoned until she loses her sight and subjected to endless humiliation, she falls from a tower in despair and dies with hatred in her heart. At the same time, Jiang Wanyu, the leader of the Xu anjing Sect, the emperor's secret intelligence and assassination organization, is ambushed and killed in battle. Xiao Jin, Jiang Wanyu's sworn brother who shares no blood ties with her, obsessively attempts to summon her soul. An unexpected turn in the ritual sends Jiang Wanyu's spirit into Xie Yunzhao's corpse. Reborn through another's body, Xie Yunzhao now carries the soul of a powerful warrior. She forms an alliance with Xiao Jin, who has come searching for her, and lies low in the perilous Prince Jing's residence. Using Jiang Wanyu's cunning and martial skills, she takes revenge, humiliates her enemies, and assumes control of the household. Xiao Jin works from the shadows to eliminate obstacles and silently protect her. As they plot their revenge together, affection gradually blossoms between them, and a forbidden romance takes root amid their hatred.