In this prequel set one year after the fourth World War, cyborg and hacker extraordinaire Motoko Kusanagi from the military's 501st Secret Unit finds herself wrapped up in the investigation of a devastating bombing.

The anime's story is set in 2027, one year after the end of the fourth non-nuclear war. New Port City is still reeling from the war's aftermath when it suffers a bombing caused by a self-propelled mine. Then, a military member implicated in arms-dealing bribes is gunned down. During the investigation, Public Security Section's Daisuke Aramaki encounters Motoko Kusanagi, the cyborg wizard-level hacker assigned to the military's 501st Secret Unit. Batou, a man with the "eye that does not sleep," suspects that Kusanagi is the one behind the bombing. The Niihama Prefectural Police detective Togusa is pursuing his own dual cases of the shooting death and a prostitute's murder. Motoko herself is being watched by the 501st Secret Unit's head Kurutsu and cyborg agents. Written by Jiilo_Kim

Motoko and Batou work to try to stop a terrorist organization whose symbol is the Scylla. Meanwhile, Togusa investigates a murder of a man who possessed a prosthetic leg manufactured by the Mermaid's Leg corporation.

In the year 2027, a year following the end of the non-nuclear World War IV, a bomb has gone off in Newport City, killing a major arms dealer who may have ties with the mysterious 501 Organization. Public Security official Daisuke Aramaki hires full-body cyber prosthesis user and hacker extraordinaire, Motoko Kusanagi, to investigate.

After sleeping for a period of 820 years, the Noblesse wakes to a modernized or a completely different world.