Xiao Yi, a modern surgeon, accidentally traveled into the chaotic world of ancient martial arts and found himself in a world where the weak and the strong preyed on each other, and good and evil were not mutually exclusive. In order to survive, he relied on modern medical knowledge to save lives and heal the wounded, and met like-minded friends such as Murong Yan. In the struggle with the martial arts leader Qin Xiaotian and the demon sect saint Ji Ruxue, Xiao Yi gradually discovered the secrets hidden in this world and the real reason for his crossing. Not only does he have to face threats from all sides, he also has to make difficult choices between justice and survival. In the end, Xiao Yi used his actions to change the landscape of the world and found his own destination.