When mysterious dungeons appear across the world, nearly everyone awakens a supernatural Skill—except for Yuuga. While others become powerful “Jaegers” and explore dungeons for glory, Yuuga is stuck as a lowly Demolisher, cleaning up monster corpses for scraps. One day, a seemingly dead Cyclops reawakens and slaughters his team. Facing death, Yuuga encounters a mysterious grim reaper-like figure. In that moment, he awakens the forbidden skill: [Undeadification]. Now reborn as the strongest necromancer, Yuuga will conquer the dungeons as a cursed, invincible force of death!