Volume one portrays Akira Fudo after he finds Miki beheaded. Cursing Satan he loses his humanity and Amon regains his body, and goes on a rampage across the globe melting everything in his path. Volumes two, three, and four go into the prehistoric world that Demons once ruled. Along the way they meet many other Demons such as Kaim, Atai (アタイ) part bug, part acid spitting Demon that later possess Miko, and Asra (アスラ) a demon with a split personality and body (much like Two-Face from Batman) who has control over a giant mass of flesh composed of many Demons. Volume six:????