In her past life, Zheng Yao misplaced her trust, leading to her murder by Princess Jiarong and her body being discarded in a mass grave. Her mother, Liu Qing, was poisoned to death by the Marquis's principal wife, Zhao Xinlan, and she herself was strangled to death due to her blind trust in Shen Fengyao. Reborn with the hatred of her past life, she is determined to protect her mother and take revenge on all her enemies. Relying on her intelligence, she successively resolves Zhao Xinlan's schemes of poisoning, framing, and kidnapping, and meets Xie Qingci, a man of noble status and profound thoughts. From mutual probing to mutual support, the two join forces to combat their enemies, gradually developing deep affections and pledging themselves to each other. In the end, Zhao Xinlan receives her due punishment, Shen Fengyao and others fall into total disgrace, her mother remains safe and healthy, and Xie Qingci returns triumphantly from battle to marry Zheng Yao with an eight-bearer bridal sedan, finally achieving a happy completion.