Atan was abandoned in front of Shuiyue Temple since he was a child and was raised by his master. She thought that the nunnery was a pure Buddhist school, but she didn't know that the nunnery had a hidden secret - it received pilgrims during the day and sent designated officials to various parts of the capital through secret passages at night. They used beauty, conspiracy and handles to weave a dragnet to exchange information for those in power and control the court.
The real owner of this "Honglou Nunnery" was Li Zhao, the eldest princess of the dynasty. When she was seven years old, she witnessed her mother being poisoned by the emperor and Concubine Ye. From then on, she pretended to be an idiot and lived a life of humiliation in the palace. With the help of the eunuch Cao An, she secretly planned to turn Shuiyue Temple into the most secret chess piece in the court.
After Atan unintentionally broke into the secrets of her senior sisters, the master finally revealed her life experience: the late queen was her biological aunt, the Shen family was exterminated by the emperor and Concubine Ye, and her mother Shen Wanning ordered the maids to send her out of Shuiyue Nunnery on the eve of the massacre. That maid is the senior sister Huizhen who has been guarding her.
Under the blood feud, A Tan and the eldest princess Li Zhao recognized each other. Two women, one endured for fifteen years and laid a dragnet, and the other stepped into the bloody storm from the pure land of Buddhism. They did not rely on swords and swords, and did not rely on the love of their children. They only used resourcefulness, patience and the life-and-death support between sisters to push the emperor and Ye Guifei's party to destruction step by step.
In the end, the eldest princess ascended the throne and proclaimed herself emperor, setting a precedent for a woman to ascend the throne. And Atan became the sharpest and most silent knife in her hand.
There is no emotional drama between men and women, only sisters joining hands and fighting tooth for tooth.