Countless virus-laden missiles fell during a torrential downpour. When rainwater contaminated with the virus touched humans, animals, and plants, peace vanished and all kinds of monsters emerged. Humanity sank into utter despair. Was it all a natural disaster, or a man-made calamity? In truth, it was nothing more than a game of chess in pursuit of immortality, a game in which everything in the human world was a pawn.
