Pei Yanci, the legitimate son of the suppressing-north general's estate, once publicly mocked Su Wanning, the sickly young lady of the grand tutor's estate, but fell for her at first sight when they met by chance at Peach Blossom Cove. As the imperial marriage decree was approaching, Northern Di invaded the borders, and Pei Yanci set out on an expedition with his father. Rumors from the frontier traveled back to the capital, leaving Su Wanning disheartened and engaged to someone else. Pei Yanci galloped back to the capital through the starry night, dismantling the rumors and breaking off the engagement, clumsily yet passionately warming her heart. When her old illness relapsed and she was on the verge of death, he guarded her bedside steadfastly, protecting her with deep affection. From an unruly youth to a devoted general, the two crossed life-and-death misunderstandings, finally gaining a ten-li red trousseau and guarding each other for a lifetime.