The prequel of "Xixing Ji", a story about the independence of the Asura tribe and the eight Dragon Gods. It tells the journey of the young Asura King who reigned over the Three Realms. Youyu, who was born with brittle and easily broken bones, met his sister who treated him as family and joined the Cast-Iron tribe, but the tribe was wiped out by a mysterious Asura, and Youyu was forcibly taken away. What will his fate be...?