Discovered twenty years ago under mysterious circumstances, Tolik Karpov grew up to be a first-class fighter. He dedicated his entire life to exterminating the Beasts. These predatory creatures only superficially resemble humans, and they can only be distinguished by their extraordinary green aura. Karpov is haunted by the mystery of his origin, but when he tries to reveal it, he finds himself in the ominous world of the Empire, where they do not know firearms. From now on Tolik is called Deger. His destiny is to be a fighter in the Arena, entertaining the bloodthirsty audience. But to survive, the ability to fight alone is not enough...