Ballad of Eternal Regret

Shangshu's daughter Xie Wanning falls in love with Yan's young master, but he sets a trap to trick her into suicide, resulting in the massacre of the Xie family. Saved by the cold and aloof medical genius Pei Qingyan, she discovers he is actually the sole survivor of the Qin family, who was harmed by Shangshu Yan and led to the destruction of his entire family. Xie Wanning, now using the alias 'Yu Wangbu', forms a revenge alliance with Pei Qingyan. A deadly reckoning against Yan's family, who holds immense power over the empire, is quietly about to begin.