12 years ago, the Labyrinth was first discovered in the Empyreal continent, since then, many adventurers from around the world have come to challenge the Labyrinth in hopes of conquering all 100 floors. In his desperate journey to save his sister, Dymos, a humble commoner finds himself on the same expedition to descend deeper than anyone else. Can he overcome the plight-ridden journey or will his sister be doomed to an untimely fate?