Guo An, a modern construction worker, died in a construction site accident and was reborn as the son of a wealthy businessman during the Chenghua period of the Ming Dynasty. The original owner was a dandy who ran rampant in the countryside and was greedy for beauty. He was humiliated by the villain because he rescued Jiang Liuming, the daughter of an official who was framed. He suddenly woke up and decided to practice martial arts to strengthen himself. After three years of hard training in Wudang Mountain, he transformed into a young man with both civil and military skills. At the time when the Ming Dynasty standardized the martial arts examination system for the first time, Guo An won the first martial arts champion by virtue of his true talent and practical knowledge. After that, he guarded the border and resisted the invasion of the Mongols and Jurchens. Although he did not achieve great achievements, he opened up a new path of "learning martial arts and bringing goods to the emperor's family" as a martial artist, inspiring countless martial arts practitioners in later generations to serve the country.