In the late spring of Qingshi Alley in the south of the Yangtze River, childhood sweethearts Yu Zhouzhen and Xiao Yi were accidentally involved in a turmoil due to a book called "Basic Sword Art Illustrations" and were chased by bandits from Heifeng Village. At a critical moment, the mysterious swordsman in blue came to the rescue, making Yu Zhouzhen's desire for swordsmanship even more intense. The two accidentally discovered a strange symbol hidden at the end of the sword manual, and found a lotus jade pendant engraved with the same symbol and a map marked "Lotus Secret Realm" in Xiao's father's study. They then learned that the Xiao family is the guardian of the secret realm, and the Black Wind Village aims to seize the martial arts secrets and treasures in the secret realm.
In order to avoid being hunted and protect their secrets, the two entered the Zhenwei Martial Arts Hall to learn swordsmanship systematically. After being challenged and tested by fellow disciples, their martial arts improved rapidly. Black Wind Village attacked Yu's family at night, Xiao's father showed his martial arts skills and saved everyone, and decided to take the two of them to the Lotus Secret Realm to find the power to fight against Black Wind Village. The three embarked on a dangerous journey and encountered an ambush in the Black Wind Village in Qingfengling. A life-and-death battle began. The ultimate secret of the Lotus Secret Realm and the fate of the two people were gradually revealed amidst the flash of swords.
