When the conflict between the surface and the underground concluded, humanity was joined by so-called "dungeon babies," individuals endowed with supernatural powers and a fixation on the subterranean labyrinths. Although Jinwoo Kim is a dungeon baby, he has suppressed his instincts, opting for a mundane existence as a guide while tending to his family. However, after an expedition turns disastrous and he inadvertently becomes the new proprietor of a labyrinth, he realizes that he cannot evade his instincts indefinitely...