A medical volunteer meets a tragic end during a devastating civil war—martyred while protecting a wounded patient. His consciousness awakens as a child in an extraordinary new world: the Murim cultivation realm from "The Supreme Demon King," a Wuxia novel he once cherished. Confronted by an overturned carriage and multiple unconscious survivors, he races to perform emergency medical treatment on everyone present. He saves Yeo Haryun, the novel's destined protagonist who will become the supreme demon lord. When rescued by the prestigious team of the Three Great Doctors, his exceptional life-saving actions don't go unnoticed. Grateful for being saved, Yeo Haryun proposes an oath of sworn brotherhood. Among the Three Great Doctors stands the legendary White Dragon Godly Doctor, renowned as one of Gangho's most brilliant healers. Witnessing the protagonist's remarkable medical talent and unwavering determination, this master takes him on as a devoted disciple. What follows is his extraordinary ascension: from reincarnated physician to Gangho's supreme medical master. Through cultivation of martial skills, medical knowledge that transcends his new world's understanding, and the bonds of brotherhood forged across two lifetimes, he emerges as a formidable force—the greatest physician the fantasy realm has ever known.