Lin Yan, an orphan from Broken Sword Valley, can hear the whispers of the sword bones. Following the teachings of Bishop Laogu, he takes "protection" as the heart of his sword. The Taichu Sword collapsed for thousands of years, and the fragments were hidden in the fireworks of the world, leading the sword gate to be looted. The old Valley Master risked his life to protect him and helped him awaken the natal sword "Shou Xin".
Entering the world with the idea of "the sword as a guardian", he meets Su Li, the legitimate daughter of the sword realm who believes in "ruthlessness", and shakes her obsession with her actions to protect the people; he meets Lao Shi, a reclusive sword-forging slave, whose scabbard hides the "peace" pattern, and reveals that "if it cannot protect people, the sword is useless."
Faced with the mystery of using "ruthless" to monopolize the sword rules, Lin Yan stood up his sword in the crisis, and the sound of the sword shook the world: "I have a sword that can protect one person, defend a city, and reverse mountains and rivers!" This sword broke through all illusions, gathered sparks in the mortal realm, and finally reforged the sword rules in the human world - the sword follows the original heart and protects what it protects. The strongest sword fire burns in the burning heart; at the end of the sword, there are thousands of lights.
