It was originally a pleasant trip, but due to an accident, I came to a strange place full of crises and mysteries. All kinds of weird things that go against common sense force us into a desperate situation every minute. In order to survive, we must fight to the death. The huge city buried underground shows that the entire world has collapsed. The huge landmass that is the last bastion of mankind is also riddled with holes and is in danger everywhere. Beasts are coming. In order to survive, we must go through a bizarre death adventure to seek the truth that exists in the ancient unknown world.
