In the towering utopia of Zalem looms over The Scrapyard, a desolate wasteland where society discards its refuse. Amidst the piles of discarded technology and filth, Dr. Daisuke Ido unearths the remains of a young cyborg, whom he reconstructs and names Gally. Awakening without memories, Gally forms a close bond with Ido, unaware of his dangerous occupation as a bounty hunter. Against Ido's advice, Gally embraces her combat skills and joins the ranks of the hunter-warriors, delving into the shadows of The Scrapyard to reclaim her forgotten past and unlock her true self.