The human mind and soul are connected. The growth of negative emotions can cause the soul to mutate, preventing it from reincarnating in the Hell, but instead remaining in the human world, transforming into a vicious ghost and causing harm to the world. Zhang Chen, a student from Jinxi County, accidentally gained the power of a prison envoy. He can devour ghosts, gaining their strength and abilities, and continuously evolving his physical body. However, with greater power comes a more terrifying world...