In the 68th year of the Mingqi era, the legitimate daughter of a military family, Shen Miao (originally named Shen Jiao Jiao), was reborn back to the time when the tragedy had not yet occurred after dying in the cold palace. In her previous life, she was infatuated with Prince Ding, Fu Xiuyi, and devoted her family's military power, enduring humiliation for five years to help him ascend to the throne. However, after securing his position, Fu Xiuyi turned against her—favoring his concubines over his wife, allowing Madam Mei (Ye Mei) to plot against her own daughter, Wanyu, and forcing the crown prince to his death. In the end, he executed the entire Shen family under the pretext of "overstepping his authority." Until her dying breath, she only realized that the second branch, Shen Qing, and the third branch, Shen Yue, had long colluded with external enemies. Her heartfelt loyalty had ultimately turned into a blood debt, and she vowed to repay this blood debt in the next life.
After being reborn, Shen Miao shed her innocence and transformed into the ruthless "Poisoned Empress of the General's Mansion." Her first priority is to protect the main branch of the Shen family, advising her father Shen Xin to avoid disaster in the northwest and steer clear of political traps, ensuring the safety of her mother Luo Xueyan and the family. In the face of the second and third branches' schemes to frame her and the old lady's favoritism, she exposes conspiracies like "marriage swap to marry a gay" and "pushing into the pond to frame," making the internal pests suffer the consequences.
Amid the undercurrents in the court, Shen Miao, relying on her memories from her past life, devised a plan: to alienate Fu Xiuyi and undermine his foundation for seizing power, exposing Madam Mei's hypocritical facade; to join forces with the Chen brothers to bloodily assault the Prince of Yu's residence, avenging her cousin's humiliation while simultaneously weakening the enemy's influence. At the Yanbei Hall banquet, she amazed everyone, and at the archery range, her skills astonished all. She completely overturned the perception of the "useless legitimate daughter," establishing her footing in the aristocratic power struggles with her intelligence and courage.
On her path of revenge, she encounters the seemingly cynical yet secretly sharp young lord of the Lin'an Marquisate, Xie Jingxing. From their initial mutual testing during a chance encounter in a secret chamber to their eventual alliance against a common enemy, the identity of Xie Jingxing, the Prince Rui of the Great Liang, gradually comes to light. He is decisive in killing and possesses exceptional wisdom. In his previous life, he overthrew the Mingqi imperial power for Shen Miao. In this life, he is even more devoted and has vowed, "The country belongs to you, and you belong to me."