A young man who reincarnated into a fantasy world, Paracelsus chose to avoid a life of combat by becoming an alchemist. His existence as a practitioner of the craft is built on a secret foundation: he possesses two hidden cheat skills granted by a divine being named Areus. The first is a recipe for all things perfect, guaranteeing success in his creations, and the second is a save maker, an ability to return to a specific point in time. Fearing that his fraudulent methods will be discovered and exploited by the ruthless alchemy community, he visits a slave trader. His goal is not cruelty but security; he seeks an assistant bound by a magical contract to keep his secrets safe.

At the slave market, Paracelsus purchases two individuals. The first is Nora, a dark-skinned human woman who is intelligent, literate, and skilled in sorcery, though she initially hides these traits. The second is a nameless elf girl, who is found in a horrifying state: her body is mutilated, she is missing limbs, and her very soul is afflicted with vicious curses. Paracelsus takes them both home, naming the elf Coco, and begins using his alchemical skills to heal her. Nora, despite being legally able to gain her freedom, chooses to stay and work for Paracelsus, hoping to profit from their arrangement. The early narrative focuses on this unconventional household, the treatment of Coco, and the protagonist’s efforts to run a small business without revealing his powers.

The story expands significantly when a high-ranking master alchemist named Agnosia Dare arrives, claiming to be concerned about Coco. Paracelsus immediately recognizes her as the one who originally cursed the elf, establishing her as a major threat. Soon after, Paracelsus is kidnapped and pulled into a mirror world by a being known as the Dark Knight, a harvester who seeks to steal his abilities. Trapped with other captive female warriors, Paracelsus must use his wits to survive and create tools for their escape, including a slime creature he names Shoggoth. Simultaneously, in the real world, Nora engages in a life-or-death sorcery duel against Areus, the god who set the entire reincarnation game in motion, who has grown bored and now views his champions as entertainment. This arc reveals that Paracelsus is not the only cheater; the world is filled with other reincarnated individuals and powerful entities who harvest or copy abilities.

Subsequent narrative threads delve deeper into the mechanics of this world. Another harvester named Wesley King, who can copy and modify the powers of others, attacks Paracelsus, leading to a confrontation where Paracelsus reverse-engineers his opponent's strategy. A sorcerer named Onnen, acting on behalf of Paracelsus’s former teacher Saint-Germain, begins cursing the protagonist from afar, prompting Nora to engage in a fierce magical battle to protect him. Throughout these trials, Paracelsus maintains his core identity as a fake—an ordinary man relying on borrowed power and careful planning rather than innate combat ability. His goal remains to protect his makeshift family and thrive in a world where gods, monsters, and fellow reincarnated individuals constantly threaten his quiet life of alchemical fraud.