Ohma Tokita enters a hidden world where corporate disputes are settled in brutal gladiator bouts. Forget the money, he just wants to fight — and win.

The story follows the Chinese fable the Legend of the White Snake and focuses on a hunter and a snake disguised as a human hunter.

A teenager discovers that he is an Ajin and flees before the authorities experiment on him. Other Ajin plan to fight back and he must choose a side.