Cyber Doctor Dyson Ido (Christoph Waltz) encounters the remains of a female cyborg in a pile of junk. Except for her human brain, her body consists of machine parts. He mends her back and becomes a replacement father for the artificial woman named Alita (Rosa Salazar). Although the rescued has no memories of the past, it soon becomes apparent that she has considerable fighting skills. This gift makes her work as a bounty hunter.