Having entered the instance dungeon located inside the subway, Jinwoo levels up time and time again by fighting waves of magic beasts. As he gradually makes his way forward, he finds a long stairway leading deeper underground.

While the C-Rank dungeon raid by Jinwoo and the others seems to be progressing well, the moment they step into an area covered in mana stones with a sleeping dungeon boss, things take a wrong turn.

Seeking the remaining ingredient for the Elixir of Life, Jinwoo continues his conquest of the Demon's Castle.

Jinwoo arrives at Jeju Island to save the S-Rank hunters, but to do that he'll have to face the Ant King.