Escape from the thousand year old cursed labyrinth underground! What you can depend on is your own strength alone.
Once upon a time, there is a small kingdom called Vitoal. Legend has it that with the protection of the dragons, the kingdom prospered.
However, due to the king's ambitions, the land ended up being cursed by what has previously given it protection and has sunk into the ground overnight.
As time goes by, a new country Vanoult is built on top of where Vitoal has been. Upon entering the kingdom's vicinity, the bounty hunter (and hunted) Ares encountered the mage Dora Drone who has set her eyes on his head.
During the fight, Dora's magic opened up the ground and the two fell through. To escape from the cursed city, the two have to climb the tower to the top while slaying monsters.