Humanity has pushed itself to the brink of extinction. After a deadly series of internal wars, most of Earth is now an uninhabitable, monster-infested wasteland. All hope seemed lost until an alien society, the Pan-Galactic Republic, came to the rescue, building Sunflower City as a safe haven. This is humanity's last chance for survival.However, not everyone accepts this new inter-species relationship, and a dangerous movement is rising up to compromise humanity's survival yet agai...