In a world where every individual is assigned a Martial Rank at birth—ranging from Stone to Heaven—your worth, status, and future are dictated by your fighting potential. At age 16, everyone undergoes the Ranking Awakening to reveal their martial potential.
Kai Densetsu, born rankless, is mocked as trash and cast aside. But what the world doesn’t know is that his soul harbors a forbidden secret: the Iron Soul, a mythical source of limitless growth and evolution thought to be extinct.
With no clan, no master, and no recognition, Kai begins a journey from the gutters of society to the very peak of martial arts. Along the way, he challenges sects, breaks ancient traditions, and uncovers the dark conspiracy behind the world’s ranking system.