Chen Xia unexpectedly transmigrates into the war-torn Great Song Dynasty and gains an indestructible body, eventually becoming a constable in the remote town of Weixi. Having been named an outstanding constable twice, he is exempted from military service. Before his captain dies, he entrusts Chen Xia with caring for his daughter, Xu Zhen, and Chen Xia promises to look after her. At first, Xu Zhen misunderstands his intentions repeatedly, leading to a series of amusing mishaps. But through his quiet kindness and sincere actions, Chen Xia gradually earns her trust. Although war is spreading thousands of miles away, remote Weixi Town remains untouched—until one day, news arrives that an immortal is recruiting disciples.