Jiang Han studied martial arts with Taoist Master Qingxu in Zhongnan Mountain since he was a child. In order to explore the truth behind his parents' death, he went down the mountain and entered the world with the three marriage letters left by his master. Possessing special skills and an upright heart, he made close friends and encountered all kinds of people and things in Weicheng. In the process of fulfilling his engagement, he faced various tests while gradually getting closer to the truth of his life experience, and started a life journey full of opportunities and growth in the bustling city.