It's 2077 and Japan has become a renegade nation closed to the rest of the world. Shielded from penetration by air, sea and space for 10 years, the island nation has become a mystery to the United Nations. The isolation resulted when it fell out with other countries over the development of robotics which was banned everywhere else. Japan has taken its creation of human androids to the extreme and the only way to overcome them is to send in a crack team to hook up with Japanese underground rebels. Enter Vexille, a female special agent, whose squad uses ultra-high-tech weapons for battle.