It tells the story of Shen Yan, an apprentice at a corpse shop in a border town, who enters martial arts to save his sick and weak sister Shen He. He seizes medicine from the Bluestone Martial Arts Hall and the rookie list, and then becomes involved in the palace's seizure of power, the Four Sects Order, and the invasion of the Western Regions.
He has an abnormal physique, and his recovery and pain tolerance are far beyond ordinary people, but he is gradually eroded by hunger, the smell of blood, and dehumanizing instincts. As the pursuit and war escalated, Shen Yan discovered that his power was not an ordinary talent, but related to the strange world behind the door. Alien beasts are rampant there, rules are broken, and the shadows of higher planes are eroding the human world. The heavenly niche seal on Shen He's body is also implicated in the old world lord and the plane's authority.
In order to protect his sister, humanity and the lights of thousands of families, Shen Yan fought his way from a low-level boy to the pinnacle of martial arts, and stepped into a strange world to pursue the abnormal physique and the truth of all worlds.
