Spontaneously hit by a devastating catastrophe, the Earth has been shaken to rubble, broken machines and decay. Amidst the debris and mysteriously non-existant bodies awakes SF A2 Miki, the last of the Vocaloid2 series. The only "living" thing left, Miki is lost within the remains of what humanity left behind, and in order to discover what it means to be alive, Miki must first come face to face with death, and love. With her memories in discord and her experience low, she must recollect the pieces of the past to recreate the future.
Along the way she finds and reboots a terribly damaged, but incredibly wise Megpoid aka Gumi. Miki helps Gumi find her missing parts and the rest of her vocal data, all the while learning what it means to be connected to somebody. Overtime however, Miki becomes increasingly paranoid, as a form of holographic ghosts haunt her as she travels to find proof of life with Gumi.
she learns that not only is someone behind the entire scenerio, but that person may be closer than she thinks. If she can make the distinction between reality what the metaphysical.