Xu Changan, a handyman of the Chixiao Alchemy Sect, accidentally swallows discarded pills and awakens the ability to analyze pill toxins and restore incomplete pill formulas. Refusing to hand over his self-researched pill formula, he is thrown into the perilous toxic fire cave by Han Jiuhe. Using the piles of discarded pills on the ground to cultivate, he overwhelms all the geniuses at the sect alchemy competition, refining the legendary Nine-Pattern Foundation Establishment Pill. Just as the Medicine King Valley comes to provoke them, Xu Changan steps forward to battle Bai Chengxiao, refining the peerless Flawless Pill. Afterward, he establishes the Residual Pill Courtyard, telling the world that pills can be discarded, but people should not be defined, walking out a different alchemical path to longevity.