In a dismal city called the Hole, a clan of Sorcerers is using people they grab off the street as the subjects of experiments in the black arts. Nikaido meets Caiman, a man with a reptile head and amnesia, and the pair begins killing every Sorcerer they find in the Hole, hoping to kill the right one and end the spell on Caiman, which brings a crew of "cleaners" who work for the Head Sorcerer, En, after them and ignites a war between two world.