Lu Zhao, a descendant of the Lin family in Hantan Town, had a blocked spiritual vein since he was a child. He was humiliated by his tribe during the crowning ceremony and became a laughing stock. After fifteen years of hard work with no results, he thought he would live an ordinary life. However, the black jade pendant left by his mother suddenly moved on a rainy night, leading him to break into the forbidden area in the back mountain and accidentally obtain the ancient sword art "Lingxiao Sword Rhythm Art" and fragments of the broken sword. Under the guidance of the mysterious guardian Ling tide, Lu Zhao learned that his mother was originally a disciple of the Xuantian Sect. She spent all her cultivation to save him, and even planted spiritual roots for him with her own blood. As his power awakens, he not only has to face the suspicion and difficulties of his family, but also attracts the demonic forces who covet the sword technique. During the raid on the Black Wind Village, the exploration of the forbidden area, and the adventure at the Sword Tomb, Lu Zhao relied on the power of the broken sword and the jade pendant to repeatedly overcome crises, and gradually uncovered the shocking secret of the battle between the real Lingxiao master and the demon king three hundred years ago. In order to seek the truth and grow up, Lu Zhao embarked on a journey to Xuantian Sect. The journey was full of dangers, and he met Su Li, a girl with golden spiritual roots, and other partners. He also encountered various difficulties from Chu Yue, the daughter of a law enforcement elder. In the Xuantian Sect, he went through assessments, secret realm explorations, and sect competitions, constantly repairing the fragments of the Lingxiao Sword, and his strength improved rapidly. However, the shadow of the demons has never dissipated, and the crisis of the loose passage of the demon world is increasing day by day. Threats such as the Blood Sacrifice Array, the Tower of Ten Thousand Demons, and the Soul Devouring Tribe are coming one after another. From a humble boy in Hantan Town to a core disciple of Xuantian Sect, Lu Zhao takes the clear heart of the sword as his way and protects the common people as his goal. He fights side by side with Su Li, Zhao Hu and other partners to uncover family secrets and the past of the sect in the game of good and evil. The continuation of the legend of Xianxia, which spans three hundred years, explains what is the true way of being strong in the trial of blood and fire.