A young Japanese pharmacist, after overworking himself to death, reincarnates into a European medieval-style world. He becomes a ten-year-old apprentice pharmacist, whose father is a renowned court pharmacist. He also gains superhuman abilities such as disease透視, material creation, and material elimination. In this world, quack doctors are common, the pharmacist's guild monopolizes the market, and medicine is unaffordable for ordinary people. With the emperor's approval, he opens a pharmacy to provide affordable, effective medicine made with his modern pharmaceutical knowledge, fighting against fake medicine and helping the common people.