On the night when Shen Zhaoning, the abandoned daughter of the cold palace, was sentenced to death, she blew up the underground palace of the imperial mausoleum with her backhand, shocking the Nine Heavens. When the secret treasure of the previous dynasty appears, the third prince Xiao Yanheng traces the truth, but finds the jade pendant around her waist in the pile of corpses - exactly the same as the relics of his mother and concubine. The queen's confidant Liu Rumei handed over the gold hairpin before she died, the female bandit Huo Jiuniang forced the palace with food, the steward Cui Sili copied the imperial edict at night, and the emperor's sister Zhao Yuluan hid hundreds of volumes. Who is the real royal bloodline? Who is controlling this dead end? She is not a useless person, she is the buried key to the country.