It has been ten years since Japan opted to withdraw from the United Nations and enter isolation. They have totally encircled the islands with an ultra magnetic field, preventing anyone from seeing what is going on inside or traveling in and out. This was due to opposition to a United Nations treaty prohibiting the development of all bio and robot technology, which has progressed rapidly and has become a threat to human life. When Japan finally moves, the US government sends in a special military unit called SWORD, led by a female commander named Vexille, to find out what is actually going on within the closed country. What happened to Japan? What caused this to happen? What exactly is Daiwa?