The great demon Mao Dante, exploiting the weakness of a boy exposed to his demonic influence in his dreams, is awakened from a thousand-year sleep.<br /><br />The intent of this being, a survivor of an ancient and forgotten civilization, is to wipe out the whole human race.<br /><br />But it's not that simple: the motivations of the demon aren't so wicked as one might think, and they will combine with the life of the boy, which hangs between nightmares and craziness.<br />In the meanwhile, the Satanists fight against the hierarchy of the church to obtain a justice which is, as it's easy to guess, that of the demon Mao.<br /><br />This series didn't have an ending until it's remake in 2002. Nagai took many ideas from Mao Dante into Devilman.