~~The following program contains adult themes and scenes of violence and sexual assault that may not be suitable for some viewers and is inappropriate for children. The content is intended for mature audiences only.~~

Centuries ago, vicious and bloodthirsty demons who were immune to all manner of weaponry plagued mankind. Humanity's cries for help brought forth the Idaten; battle deities who would use their incredible speed to hunt the demons down, and then seal them away. In the following 800 years of peace, the Idaten have not had any enemies to fight. But that is about to change...
But what if this doctor isn't human?
لكن ماذا لو كان هذا الدكتور غير بشريّ؟
Aber wenn dieser Doktor
gar kein Mensch ist?
Pero si ese profesor no fuera humano…
Pero si ese profesor no fuera humano…
À moins que le professeur
ne soit pas humain.
E se questo dottore non fosse umano?
E se esse doutor não for humano?
Но что, если этот профессор не человек?