Karakuridouji Ultimo: Zero
機巧童子 ウルティモ: ゼロ
Two mechanical beings, Ultimo and Vice, were originally designed in feudal Japan to embody "perfect good" and "perfect evil" as part of Dr. Dunstan's final curse. A millennium later, a masked monster attacks Farmless City in West Tokyo, overwhelming the S.K.A.T. Police. Ultimo intervenes, confronting the creature before it transforms into Vice, his opposing force. Their battle leaves both severely damaged, marking the start of organized activity across Japan.