A space colony named Antilia revolving around Jupiter in the late 22nd century is attacked by a terrorist force called BAHRAM. They use Orbital Frames, or big robots with many weapons that mostly are human-like in structure, in their attack. Their mission: capture the colony and therefore taking control of two amazing new Orbital Frames being kept there. After Leo's friends are killed by a skilled woman frame runner, he stumbles upon one of the new frames called Jehuty. (wiki)