Shen Qingci, the concubine of the Shen Mansion in Jiangnan, suffered from the cruel treatment of her biological mother when she died young, but she secretly learned arithmetic and medical skills to endure and accumulate strength. She was introduced by her eldest sister Shen Jinrou (the principal wife of the Gu family) to compete with Liu Miaoyin, the outer chamber of the family. She was originally a chess piece, but she amazed everyone with her beauty and resourcefulness. Gu Yanzhi, the Secretary of the Ministry of Finance, fell in love with her at first sight. From protecting her to loving her deeply, she became a maniac who protects his wife. She uncovered loopholes in the accounts, uncovered the poisoning of the false pregnancy, outsmarted the main wife, the outside wife, and the Shen family's aunt, found out the truth about her biological mother's murder, and completed her revenge. She also used arithmetic to help Gu Yanzhi resolve the crisis in the court. In the end, she broke the shackles of being a concubine, was granted the title of Lady of the Secretariat by the emperor, and joined hands with Gu Yanzhi to protect her children and stabilize the family, achieving a legendary counterattack from being bullied by others to being in power in the inner house.
