Lu Qingyuan, a knight from the south of the Yangtze River, went to the north to visit the hermit Lin Mochen with letters from his old friends, hoping to reveal the truth about the "Qingshan Case" twenty years ago - the case implicated the destruction of dozens of sects in the world, and hid the ambition of the mysterious force "Hanjiang Pavilion" behind it. On the way, he met Lin Wanqing, the daughter of Lin Mochen. The two went from being suspicious of each other to working hand in hand. They not only had to deal with the pursuit of Hanjiang Pavilion and the assassination of Jianghu sects, but also solved the hidden secrets of the Lin family. As the investigation deepened, Lu Qingyuan discovered that his life experience was closely connected with the "Qingshan Case", and Lin Mochen was a key figure in the case that year. In the end, the three gathered the power of justice to smash Hanjiang Pavilion's conspiracy to control the world and restore peace to the martial arts world.
