 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 his friends are killed by a skilled woman frame runner, or person who controls the Orbital Frames, he stumbles upon one of the new frames called Jehuty. His only purpose is to get out, but personal feelings and a few other things get in his way...