Fulfilling her father's dying wish, Jiang Wan marries He Yanci, a frail man with failing eyesight. Upon entering the He family, she finds herself constrained by everyone around her, but begins investigating clues hidden in old account books. He Yanci produces letters exchanged by their fathers, and the two gradually let down their guard and learn to trust each other. Together, they uncover the truth about how the Jiang family's business was seized and how their fathers were wrongfully accused and victimized. After enduring numerous dangers, Jiang Wan finally lets go of her past obsession and openly expresses her desire to spend her life with him. From then on, they remain devoted to each other, their family continues to grow, and they begin a lively, joyful life together.