The sequel to the Battle Angel Alita/Gunnm manga, ignoring the original ending.

When Doc Ido, a talented cyber-physician, finds Alita's head in a junk heap, she has lost all memory of her past life. But when he reconstructs her, she discovers her body still instinctively remembers the Panzer Kunst, the most powerful cyborg fighting technique ever known. In the postapocalyptic world of the Scrapyard, as the secrets of Alita's past unfold, each day is a struggle for survival.

(source: Kodansha Comics)