On the seventh day after the emperor's death, Shen Zhaowei, the daughter of the criminal doctor, received an imperial edict: Haizheng enters the palace to diagnose my pulse. Late at night in the imperial city, she saw Xiao Chengjin who was supposed to be lying in the Zi Palace - he could speak and act, but he had no pulse and no shadow. What's even weirder is that lying in the emperor's golden coffin is actually her father who was beheaded three years ago. Her father woke up briefly and left her with only one warning: the eleven emperors of Dayan may have always been the same "person". In order to find out the truth about the Shen family's annihilation, Shen Zhaowei followed the pulse, corpse traces and abnormal shadows into the depths of the palace, but met the prince Xiao Yanci who had died three years ago and now bears a double shadow. As the succession ceremony approaches, a pulse-changing ceremony that has lasted for four hundred years is about to begin again. Some people use corpses to bury their souls, some people use their shadows as parasites, and some people still don't realize that their names have been taken away. What Shen Zhaowei wants to heal in the end may not be one person, but a country that continues to this day with the lifeblood of everyone.
