Shanhai Pass, where entry is permitted but exit is not, protects the Great Xia Dynasty from demons and evil spirits! Qi Huai, a medical student, is transported to Shanhai Pass and becomes the person responsible for dissecting demons. He possesses a 'Living Being Scale,' which allows him to obtain life energy by dissecting beings. This energy can be used to exchange for various treasures and supernatural abilities. Shanhai Pass is filled with demons, and Qi Huai spends his days dissecting them, secretly growing stronger and using various aliases to carry out tasks. When questioned about his connection to a powerful figure known as 'the God Slayer,' Qi Huai insists, "That's my alias's alias!"