The old giants of good and evil died together in a bloody battle, and the world ushered in a new era of chaos. The "Four Hegemons of the Central Plains" of the righteous way and the "Five Powers of the Devil" of the evil way stand side by side. They are ambitious and intend to dominate the world.
In the prelude to this bloody storm, the second son Shen Yunbei, who was abandoned by the "Beitian Shen Family", the giant of the Central Plains, concealed his name and took the initiative to enter the most cruel training ground of the Demon Sect - the Blood Demon Valley, as "No. 300". This is a hell on earth, where hundreds of children have been stripped of their names and emotions and used as "weapon" materials, struggling to survive amidst poison, hunger and endless fighting. Five years from now, not even one person will be able to walk out of here alive.
Shen Yunbei carries the flame of revenge and unknown secrets, and uses amazing perseverance and understanding to practice in this man-eating abyss. He drank the extremely poisonous Juepo soup, practiced the basic skills of the demon sect diligently, and sharpened his sword on the edge of life and death. When the devil's cult's plan to raise gu intersects with the young man's desire to change his destiny, a legend that makes the entire world tremble is slowly emerging from blood and bones.