Su Lingqing endures eighteen years of brutal torture at the hands of her husband, Zhao Mingcheng, and her younger sister, Su Yaoyao, before dying in a blood-soaked dungeon. In her final moments, she realizes that her entire life was a sacrifice made for others, having married into Prince Ning's residence in her sister's place to save Su Yaoyao from a dangerous political alliance. Consumed by hatred and regret, she wishes for another chance to live. Her wish is granted when she awakens eighteen years in the past, on the day her stepmother, Zheng Rui, attempts to marry her off to a degenerate man as part of a scheme to humiliate and control her. Recognizing the opportunity for revenge, Su Lingqing immediately shifts from her previous timid persona to a cold, calculating strategist. She physically assaults the servants sent by Zheng Rui, beating Old Madam Zhou until she is nearly dead, and publicly exposes the stepmother's malicious intentions in front of the entire household. This bold move shocks her family and establishes her new, unyielding character.
Su Lingqing then ventures into the capital's black market, seeking information and allies to dismantle the enemies who destroyed her in her past life. She encounters Jiang Ciyan, the young and ruthless Regent Prince, who is known as a smiling tiger. Su Lingqing negotiates a transaction using a token from her deceased mother, purchasing information about her mother's suspicious death and acquiring two loyal servants. During her journey back, she is ambushed by bandits hired by Zheng Rui, but she fights back with skills she had hidden for years. Jiang Ciyan arrives just in time to save her, revealing that he had been following her. Their encounter marks the beginning of a complex relationship, as he becomes both a potential ally and a dangerous variable in her plans.
Upon returning home, Su Lingqing discovers that her father, Su Huai, has brought back a new concubine, Zhou Jianyue, a beautiful woman from Jiangnan who claims to have saved Su Huai's life. This changes the dynamics of the household, as Zheng Rui's authority is immediately challenged. Su Lingqing navigates the treacherous family politics with precision, using Zhou Jianyue's presence to further destabilize Zheng Rui and Su Yaoyao. She pretends to be weak and obedient in public while secretly consolidating her power and gathering intelligence. Meanwhile, Su Yaoyao, desperate to maintain her status, conspires with her younger brother, Su Yuan, a psychologically unstable boy who harbors an obsessive and twisted fascination with Su Lingqing. Su Yuan demands that Su Yaoyao hand Su Lingqing over to him once their schemes succeed, adding another layer of danger to Su Lingqing's already perilous situation. As the imperial decree for the political marriage arrives, Su Lingqing prepares to face the same fate as before but with the knowledge and resources to change her destiny, setting the stage for a fierce battle against her family and the man who tortured her to death.
