During the Song Dynasty, imperial physician Lin Jueyuan was killed mysteriously. In order to trace the truth, Liu Yunxi, the eldest son of the Marquis of the Northern Kingdom, went deep into the matter and discovered that the case was related to a period of right and wrong 20 years ago, and was even related to the fall of the Northern Han Dynasty. As the case deepened, he discovered that he was an important trump card in the conspiracy.
Lin Zhiqiao, the daughter of an imperial physician, came to Chang'an to investigate the cause of her father's death, but was involved in a bloody palace battle. Where should she go?