In troubled times, Hua Banxia, an orphan girl from a medical clinic, marries the grandson of the Iron Guard Commander at the behest of her grandfather, but she stays alone in the empty house on her wedding day. Two years later, Shi Zheng, the former commander of the Iron Guards who returned to the world, reunited with her in the fire scene and trapped her in the Jingxin Hall in the name of "protecting her." As the old situation restarts, Hua Banxia gets involved in the disputes between the rivers and lakes by relying on ancestral medical classics and silver needle skills. Shi Zheng also protects her from the wind and rain in secret. The two gradually reveal each other's dusty past and sincerity from a "nominal" couple, and finally work together to break the situation, creating a sweet and sadistic entanglement of marriage first and love later in the shadow of swords.
