2077--10 years has passed since Japan had decided to leave the United Nations to go into isolation. They have completely blocked the islands with an ultra magnetic field which prevents anyone to see what is going inside, nor for people to travel in/out of the country. This was the result of opposition to a treaty which the UN has passed, preventing the development of all bio and robot technology which has evolved drastically and has become a threat to human beings. When Japan finally begins to move, the US government sends in a special force team SWORD, lead by a female commander Vexille, to investigate what is really happening inside the closed country.