The story is set in another world， where things are slightly different from reality. A series of wars have torn the world into two， the East and the West. Over time， both sides have achieved peace in their own way and asserted their agendas. An executive of Mitsuoka Pharmacy， one of big companies in the West， is assassinated. The company has been developing a new type of cell that can regenerate sick or aged parts of the human body. Mako， a researcher at the company， is pinned down by a sniper. Rio and Mei are called to protect Mako. But it seems more than one terrorist is involved in the assassination of Mako. May’s car is suddenly attacked by armed soldiers. The girls get engaged in combat. Bullets fly all over. When Rio and Mei think they have protected Mako， a beautiful assassin attacks them. Why should Mako’s life be aimed at? Who are those terrorists? In the meanwhile， a man comes to Rio’s mind. He knows why and they go after Mako，who they are and everything. And he escapes from the prison， unnoticed.