After being captured from the surface, Kishin (known as Experiment 666) is forced into staying at a lab of demonology in which multiple scientists conduct research on many demons. You, an expert, has been assigned to watch over the demon and learn whatever you can from his behavior.

When you enter the underground Kishin hisses loudly as the blinding lights burn his eyes and he struggles in the chains binding him to the wall, snarling at you furious.