Summary
Four years have passed since the first outbreak of the Unknown virus epidemic, and the terrifying plague that plagued the Tohoku region of Japan has become a memory only thanks to drastic quarantine measures and a successful vaccine. However, the Unknown virus is not dead yet, and soon, very soon, an inescapable doom will strike Wataru Ayase and his family and friends inside the madhouse called “Hell on Earth,” which was once their home.