The mysterious letter code and tattoos, the inescapable Albert Human Regeneration Laboratory! An island full of fog, a cruel game, and everything is just for a set of passwords! Who is controlling all this behind the scenes! Betrayal, killing, despair, all the darkness... Just for the ultimate destruction! The night is so quiet that there is no sound of the wind blowing the trees, and there is no sound that is so quiet that it makes people stand on end. Everything around them is only darkness. It is different from the darkness of the night, but the kind of darkness where you can't see anything even if your hands are shaking in front of your eyes. Just like the human heart at this moment, everything that cannot be seen or touched is hidden in the darkness. This is a world with only black, this is a world with only dust in the end and no hope - the game is in progress... The ending is that no one survives.