Shen Qingyan, the legitimate daughter of the loyal and brave Marquis Manor, was framed by her concubine-born sister Shen Qingrou and the Jing Manor's young master Xiao Jingyu in her past life, resulting in her entire family being falsely accused and dying a tragic death. Reborn in a single lifetime, she returned to three days before her coming-of-age ceremony. Shen Qingyan concealed her brilliance and planned step by step, exposing the plot of poisoning and framing, collecting evidence of the other party's conspiracy, and publicly severing the engagement at the coming-of-age banquet. Facing the successive frame-ups from the Prince Jing Manor, she and the Northern Defense General Xie Yanci formed a strong alliance to ferret out the mastermind behind the imperial court and harem. After the storm broke out, everything was left to the judgment of the law, and the villains accepted self-examination and disposition according to the law. Shen Qingyan cleared her family's grievances and happily tied the knot with Xie Yanci. Seeing through the court disputes, the two chose to achieve success, retire, and retreat to Jiangnan, protecting the peace and stability of the whole family.