The story is set in Chang'an City during the Tang, Wu and Zhou Dynasties. It was the first year of Tianshou (690), Wu Zetian proclaimed himself emperor and changed the Yuan Dynasty. The trend of informing became popular, and undercurrents surged between the twin cities of Luoyang and Chang'an. A "human skin lantern" suddenly appeared in Chang'an's West Market, and the ghost market spread that the fragments of "Tuibei Tu" predicted that "the heroine will prosper", and the fragments of "Yi Si Zhan" left by Li Chunfeng, the young minister of Dali Temple, actually recorded the technique of deciphering the astrology used by Yin soldiers. Princess Taiping secretly formed the "Jinwu Guard Hidden Stake" to secretly investigate the "win-weary art" buried under the Daming Palace, while the "Zoro Worship Cult" of Persian Zoroastrianism in the Western Regions was planning a shocking conspiracy. (The content of the story is purely fictitious and is for entertainment purposes only)