Ling Yun and Su Muxue had never thought that there was a world of warriors and martial spirits hidden under the peaceful city. After a strange red rainstorm, Ling Yun awakened the useless martial spirit "Rusty Iron Sword" and was ridiculed; Su Muxue awakened the rare "Ice Crystal Phoenix" martial spirit and was competed by major forces.
In order to protect Su Muxue, and to break the "waste" label, Ling Yun accidentally triggered the mysterious system, and the rusty iron sword was able to swallow other martial arts evolutions! From campus martial arts to urban secret realms, from fighting evil martial arts organizations to revealing the secrets of ancient warriors, Ling Yun relies on his evolved martial arts and extraordinary resourcefulness to counterattack all the way. Joining hands with Su Muxue, they create their own legend in the dangerous urban world of martial arts!
