Mu Yunge, the subjugated princess from the country of witchcraft "Yelan", was sent to the harem of the Great Xia Kingdom as a marriage tribute and married to the emperor Xiao Jue, who was famous for his cruelty. Everyone thought she was a lamb to be slaughtered, but they didn't know that she was the last royal witch in Yelan, charged with the mission of blood feud and national restoration. After entering the palace, facing the bullying from the concubine and the difficulties made by the palace people, Mu Yunge remained calm and relied on mysterious witchcraft (star divination, plant psychics, invisible curses, etc.) To kill the enemies one by one and resolve the crisis. Using her weak posture and using powerful methods, she gradually transformed from a bullied princess into a mysterious being who frightened the entire harem.
The cold and violent emperor Xiao Jue originally regarded her as a pawn, but he was attracted by her unfathomable methods and tenacious soul in repeated confrontations. He probed, tested, and finally fell. The two went from being enemies who were wary of each other and taking advantage of each other, to gradually becoming the only allies and lovers who can support each other in the whirlpool of power and intrigue. When the secrets of the "witch hunt" buried deep in the Great Xia Dynasty were revealed, Mu Yunge not only wanted to avenge himself and his tribe, but also joined forces with Xiao Jue to fight against the mastermind who attempted to destroy all witchcraft inheritance in the world. In the end, he helped him stabilize the country, ascended to the throne, and ushered in a new era in which witchcraft and imperial power coexisted.