Perhaps it was a coincidence of fate or a trick of God that caused the modern girl He Qin to exchange souls with the little palace maid Guan'er of the Dading Dynasty. He Qin, who has been pampered for thirteen years, has to learn to survive in the humble cracks of the harem. Guan'er, who has been immersed in the harem since childhood, also has to face endless challenges brought by modern society. The two people, who had a strong desire to return to their original lives, finally discovered that the connection between the two of them turned out to be an ancient jade.