'Who I am? Doesn't matter... Where I am? Doesn't matter... Why I am? I'm here to bring shatter.' 'Who we are? We are 'Angels'. For protecting... for helping... to spread light... to bring down heaven... against Hell, goes our Fight.' The story follows the four main characters, who are dead but have been given a second chance of life. They are incomplete angels, living to fullfill promises they made in their lifetime and they dont know anything about them. As incidents involving a terror group called "Hell's Revolution", demons and even Fallen Angels start to happen frequently all around the globe, the Angels will not only have to decide their own destiny...