Lin Wanqiu, a modern social animal, transformed into the fake daughter Su Wanqing who was about to be executed in the fictional dynasty "Yin Dynasty". The tyrant Xiao Jue gave her a poison and ordered her to sneak into the harem as an informant to steal the life of the real daughter Su Yunxue for his own use.
In search of a cure, Su Wanqing used her modern workplace wisdom to stand out in the talent show, but was shocked to discover that the gentle and kind-hearted real daughter Su Yunxue was actually a "prophet" who had returned from rebirth and vowed to avenge her and the tyrant.
Su Wanqing struggled to deal with the tyrant's death threat and Su Yunxue's revenge trap. She tried to reveal the truth about time travel to Su Yunxue in order to form an alliance. However, she suffered more violent revenge from the other party because of the hatred in her previous life, and was forced to be involved in the shocking conspiracy between the former dynasty and the harem.
When the tyrant Xiao Jue finally let down his guard against her and revealed his sincerity, Su Wanqing discovered that the poisonous "trigger" in his body could only be solved by her heart. She was the "medicine man" he chose from the beginning, and the tragedy of Su Yunxue's previous life was caused by Xiao Jue.
On the night of the palace coup, Su Wanqing was no longer willing to be a pawn. She took herself as the final bet, united with the oppressed concubines and the power of the previous dynasty, and at the same time fought against the tyrant and the revengeful "sister". Finally, she solved the mystery of her life experience, broke this cycle of calculation and hatred, and walked out of her own way.
