Cursed with an F-rank Trait—deemed the absolute weakest—young Shin Yu-sung is rejected by the prestigious Shin-oh family, master trainers of hunters. At the orphanage, his fortune reverses when the legendary Fist King, a supreme hunter warrior, adopts him as his protégé. Unlike typical hunters who depend on innate Traits or hidden powers, the Fist King achieved dominance through pure physical discipline. He discerns Shin Yu-sung's true potential beyond surface weakness: a body harboring Nine blocked yin pathways. This curse manifests paradoxically—mana surges through him, creating extraordinary intelligence and divine-like features, yet condemning him to perish before maturity. Within him pools an abundance of primal yang energy—the sole force capable of shattering his sealed pathways and rewriting his predetermined doom.