Allen was raised up in the underworld, the bottom part of the megacity where people thrive for their own survival. One day he pick up an abandoned experiment, Noel, which later led him to unravel the secret of Ayothaya (the Apex floor of this gigantic city). In 2177, every civilization already vanished from the catastrophe of global destruction. Once human was reunited, but now all fighting each other dividing humankind inside this corrupted megacity.