In a distant future, Doctor Ido discovers the remains of a young cyborg in a scrapyard, her brain still intact. He rebuilds her and gives her the name Gally, but she has no memory of her past. After discovering that she instinctively possesses highly advanced combat skills, Gally begins a journey to understand who she truly was. In a brutal world dominated by the floating city of Zalem and the slums beneath it, she faces bounty hunters, criminals, and enhanced fighters while trying to define her own identity and place in society.