In a remote corner of the eastern region of the Lancang Continent, a vast territory enclosed by towering mountains and the sea has been isolated from the outside world since ancient times. More than a hundred kingdoms coexist here, in a place known as the Domain of a Hundred Kingdoms. In Qianlong City of the Xingque Kingdom, an ordinary young man goes about his usual life of treating the sick and saving lives. Then several blade-wielding men suddenly arrive and forcibly take him away for no reason. What awaits him is a woman covered in wounds. From that day onward, the young man embarks on a long journey from which there is no turning back…