The theft of the dragon scale pendant triggered a three-way secret war between the court, the Jianghu and the figures of the previous dynasty. Jiang Xiao, the prodigal son, originally wanted to be free from the world, but he was involved in a whirlpool because of his old friend. He deals with the emperor's mind, the character of a Confucian general, the mysteries of Taoism and the compassion of Buddhism, and faces his own old hatred of destroying his family. In this chess game related to the fate of the country and his personal destiny, he used the sword in his hand and the emotions in his heart to pursue a glimmer of light in the darkest moment, and to prove the true meaning of Xiaoyao in the vast world of mortals.