A secret military project endangers Neo-Tokyo when it turns a biker gang member into a rampaging psychic psychopath who can only be stopped by a teenager, his gang of biker friends and a group of psychics.

A deadly and mysterious master of the occult travels across feudal Japan, seeking malevolent spirits called Mononoke to slay. He must uncover their Form, Truth, and Reason to wield the mighty Exorcism Sword against them.