Some people say that a person who understands the cause of everything is a happy person. It took Ji Xun so many years to learn to pursue the cause. A military encounter led to a shocking truth. When the original belief is shattered into ashes, when hope and disappointment are both weak, where should we go? What is the connection between Gu Jing, a wandering Jianghu guest, and him? Is it a conspiracy or a confidant?