Ido, the cyborg mechanic is (as usual) searching around the the scrap yard after spare parts for robots and cyborgs. Today he finds a special item, a upper part of a cyborg body, still alive. He takes her home and repairs her. She is given the name Gally. She has no memory of her past, and she's curious of everything. Unavare of Ido's proffession as a Hunter Warrior, she lives peacefully, but as time goes by she keep getting suspicous. When she finally finds out she decides to become a Hunter Warrior also.