This is the story of a lone swordsman's memories, recalling the love and heartbreak of his youth before he became a solitary swordsman. The lone swordsman's real name is Zhao Yuan, and his courtesy name is Zichen. As a child, he was nicknamed Zhao Xiaodao because he loved playing with swords and blades, always holding a saber or clutching a sword. In his youth, he happened upon a gifted master and learned orthodox swordsmanship. But his good fortune did not last. His sect was destroyed by a demonic fiend, and, gravely wounded, he fled and was rescued by a woman named Lin Zhiyi. The two fell into a romantic love story, though their relationship was full of twists and turns, with many partings and reunions. The martial world is never free of turmoil. To save it, he turned the tide in its darkest hour. At last, he became a renowned swordsman and purged the wicked from the martial world. He earned the name of a great hero, but lost the one he loved and lived out his days alone, remembered as the Lone Swordsman.