Our heroine, beautiful cyborg Alita, has finally penetrated the center of Melchizedek, the supercomputer who is holding her friend Lou's brain hostage. There she is transfixed by a vivid vision of the undead life of Caerula. As the waking dream continues to unfold, Alita learns the secret behind the origin of the Scrapyard where she was reborn, humanity's journey to the stars, and the awesome responsibility that has been entrusted to her...
Continuing as a vision of the past, the narrative continues to tell the story of the ancient vampire, Caerula. The origin story of Tiphares, the Scrapyard, and man's journey into space are here.
— Description from Comic Vine community (comicvine.gamespot.com).
