World distorted darkness. The place is completely absorbed darkness called Avidya area. It is home to creatures living at the expense of desperate people, and are in fact the essence of the infernal call them - Imashime. In Zone Avidya sent an expedition,but this darkness gradually drains from people of their human essence. So good at the intersection of the past and the dark, rotten and crisis of the future... eight guys are trying to confront Imashime in order to bring peace back to his " clean" original appearance, before he was swallowed Avidya.