Shin Yu-sung, a five-year-old with an F-rank Trait, is cast aside by the renowned Shin-oh hunter family. Labeled as worthless, his fate changes when the legendary Fist King discovers him in an orphanage. Unlike others, the Fist King sees potential not in traits but in raw physical training. He recognizes Yu-sung’s unique condition—nine blocked yin pathways, which flood his body with excess mana, granting him unmatched intellect and striking beauty. Yet, this same flaw threatens his life before adulthood. However, his overflowing yang energy holds the key to survival, offering a rare cure for his deadly condition.
