In the world of Murim, there are two legendary titles: Shin-ui (神醫) – the Divine Doctor of the Orthodox Sect, and Ma-ui (魔醫) – the Demonic Doctor of the Unorthodox Sect. What if these two opposing forces… got married? From this legendary union comes Dan Ak-seon, a child born with the unmatched medical genius of both parents. But just as he’s growing up, fate intervenes. A mysterious absolute master appears before him— an encounter that will pull young Ak-seon into the chaos of the martial world. Armed with both divine and demonic healing arts, his journey through the rivers and lakes of Murim begins now!