Liu Xinyan, an outstanding modern policewoman, is mortally wounded during a commercial kidnapping case. The next moment, she transmigrates into the body of the personal bodyguard to Liu Li, a general’s daughter in a fictional dynasty. But instead of behaving like a well-bred young lady, the general’s daughter insists on becoming a constable in the Esoteric Hall. As her personal bodyguard, Liu Xinyan naturally has to take a post there as well.
Returning to her old line of work in ancient times, she investigates cases for the Esoteric Hall and discovers the filth of the court and officialdom, as well as the darkness of this world. A spoiled young nobleman can harass an official’s illegitimate daughter and go on living carefree, while the girl’s family drops the matter with barely a word and even comes to resent Liu Xinyan. Corrupt officials’ embezzlement is the least of the problems. Treacherous schemes and vicious plots are hidden even in the smallest cases. Hardest of all to stand against are the unpredictable whims of those at the very top. She uses every ability at her disposal to protect the General’s Residence, and in the end, joins Lü Qingjue to become a chivalrous thief.