When Shen Lingyi was young, her elder sister took her under her wing, bringing her out of hardship and teaching her to read, understand reason, and conduct herself properly. After marrying into the Pei family, her sister endured a difficult life and died prematurely, leaving behind only a baby son. Not long after his first wife's death, Pei Jingchuan planned to make his childhood sweetheart his official wife. Shen Lingyi, a high-ranking palace official, obtains the Empress Dowager's decree of marriage, dresses in plain white, and steps into the bridal sedan, entering the Pei residence. She has no interest in romantic love. Her only purposes are to protect her helpless young nephew and uncover the hidden truths surrounding her sister's past. What should have been a grand wedding ceremony becomes a carefully laid trap. The secrets buried beneath the walls of the Pei household will eventually be brought to light, and right and wrong will receive their proper judgment.