Chu Ning, a young man who fled from the Northern Border, resolutely enters the bloody trials of the Demon Suppression Bureau to prolong the life of his younger sister, Chu Yao, who has depended on him for survival. In everyone's eyes, a fighter at the third level of the Body Tempering Realm is nothing more than an extra meal for the demons. Facing a green-scaled snake demon two realms above his own, Chu Ning has no way out. Just as he risks his life in a desperate fight and narrowly escapes death, the legendary Ultimate Demon-Slaying System awakens explosively within him, granting him the Nine Suns Divine Body! From then on, every demon and evildoer he kills allows him to plunder cultivation, obtain divine techniques, and evolve his physique. But this power arrives just in time—for the mission rewards from the Demon Suppression Bureau are not enough to repay his sister's medical expenses.