A modern woman, Shen Qingzhi, once traveled through time and became a concubine at the mercy of the Shen family of the Jin Dynasty. The original biological mother possessed the lost ancient mechanism skills, but she died young with regret due to being involved in an old case of the previous dynasty and the Rong family's frame-up, leaving only a white jade longevity lock with a hidden secret key and incomplete mechanism blueprints. In order to cling to the rich and powerful, the Shen family wanted to send her to marry the violent old prince. When the situation was desperate, the emperor Xiao Che suddenly appeared and took her back to the palace. It seemed to be redemption, but in fact it pushed her into the chessboard of the game.
