My Lady of the Marquis's House, The Unfaithful Prince Steps Aside

After eight years of disappearance, Shen Qiuci returns to the capital, only to find her father and brothers dead and her eldest sister wrongly killed in the Marquis's mansion. To uncover the truth, she assumes her sister's identity and takes control of the mansion with ruthless efficiency, engaging in a battle of wits and courage against the Prince and his favored concubine, Xue Yinshuang. On the court, she exposes the conspiracy with irrefutable evidence, gradually undermining the mansion's foundations, only to discover that her sister's death is linked to a vast mysterious organization called the Tianji Pavilion. Determined to reveal all the truth, Shen Qiuci vows to bring justice to the deceased and punish the guilty.