After the war bridging the surface and underground realms, humanity welcomed the emergence of 'dungeon babies'—individuals with mystical powers fixated on subterranean mazes. Among them, Kim Jin-U, a dungeon baby himself, shuns his nature to lead a mundane existence as a guide and provider for his loved ones. However, when a routine journey takes an unexpected turn, thrusting him into the position of a labyrinth's new master, he grapples with the inevitable awakening of his latent instincts, realizing that his true calling cannot be denied.