Modern chemist Su Huai transmigrates into a low-level alchemy apprentice of the Qingyun Alchemy Sect. On the verge of death, he uses scientific alchemy techniques such as acid-base neutralization, extraction, and catalysis to refine top-quality pills, exposing the toxicity of ancient methods and the monopoly conspiracy of Zhou Hong and the Zhao family. Sentenced to whipping, he stakes his life on three sticks of incense. Zhou Hong repeatedly sets death traps, the Zhao family cuts off spiritual materials, and a secluded alchemy sect makes things difficult with incomplete ancient recipes. Standing shoulder to shoulder with him, Yun Xi mass-produces pills and publishes alchemy recipes, defeating the secluded alchemy sect. Finally, facing the remnant soul of the Heavenly Dao that harvests all living beings, he reshapes the rules with chemical equilibrium, allowing everyone to refine pills and cultivate immortality.