Su Fan, who grew up on the top of Shennong, learned the "Yin Yang Medical Classic" and the mysterious "Yin Yang Secret Scroll" of the Shennong lineage, and was awarded the title of "The Prince of Hell", but his life was hanging by a thread because of the broken Nine Yang Vein. The master told him that he could only survive by marrying a daughter of the Yang family. Carrying a marriage letter and red truffles, Su Fan stepped into the bustling city.
In the Yang family, fiancée Yang Zixin was humiliated in public and broke the engagement. At a critical moment, Yang Susu, who is physically disabled and strong-willed, takes the initiative to marry Su Fan in order to repay her kindness and maintain her dignity. After the marriage, Su Fan, a seemingly ordinary "poor boy from the mountains", showed extraordinary strength time and time again in dealing with illnesses and disputes in the world. Yang Susu's attitude towards him gradually changed, and their relationship quietly heated up.
However, the hostility of Yang Zixin and the forces behind him, and the coveting of his abilities by all parties followed one after another. When the news that "The Lord of Hell has descended into the world" spread throughout the nine states, the three princesses and the Holy Maiden of Kunlun also came to find him. Su Fan was trapped in the whirlpool of the city and the rivers and lakes. How will he write his own legend?
