It is the distant future. The world has gone through doomsday, which turned most of the planet into a lifeless wasteland. Humanity has changed dramatically; all people have turned into mutants with vivid signs of different animals. Huge cities were built - the last islets of civilization. And to keep the mood of the survivors up, authorities set up the Game - a deadly competition of runners in which they must not only avoid obstacles but also knock their opponent out by any means.