In 2034, two years after the events of 2nd GIG, Public Security Section 9 investigates a string of mysterious suicides among refugees from the Siak Republic. Chief Aramaki leads a raid to arrest the refugee dictator, only to discover that the man is already dead. In response, a Siak operative plans a terrorist attack using a micromachine virus, and Batou is dispatched to intercept him. During the confrontation, the operative dies, striking a uneasy chord between pursuit and foregone conclusions. Motoko Kusanagi is pursuing her own line of inquiry, and when their paths cross, a tense encounter unfolds with mutual caution. Before they can apprehend the operative, he dies while attacking them, leaving behind a trail of clues in the form of virus ampules that Kusanagi later retrieves. She warns Batou to steer clear of the enigmatic Solid State Society as she departs, her resolve as cool as it is purposeful.
Section 9 operatives begin to piece together a theory about a hacker known as the Puppeteer, a shadowy figure whose fingerprints are tied to the Siak suicides. Meanwhile, Togusa learns of sixteen kidnapped children who were meant to carry the virus, all listed as offspring of the so-called Noble Rot Senior Citizens. The investigation expands as the team suspects a wider conspiracy, hinting at a colossal network that could involve as many as 20,000 children. The Puppeteer’s influence seems to ripple through the system itself, a digital echo that binds disparate acts into a single, ominous design.
Soon the Puppeteer orchestrates the disappearance of the sixteen children, and Batou reveals to Togusa his growing suspicion that Kusanagi may herself be the Puppeteer, a suggestion that rattles the already fragile balance within Section 9. As they close in on the mastermind behind Ka Rum’s assassination, a Siak sniper is intercepted, and the captured informant reveals a shocking truth: the Puppeteer is a mechanism embedded within the Solid State, and cannot be simply killed.
Togusa tracks down one of the missing children, now assigned to an elderly man in the Noble Rot program. When he tries to take the child, the man wakes and asserts that the child is his sole heir, preferring to leave his assets to a child from the streets rather than handing them over to the government at his death. The warning is blunt and final, and the man dies soon after, reinforcing the notion that meddling with the Solid State’s plans carries a deadly cost.
A dramatic turn comes when Togusa receives a call from the Puppeteer, who hacks his brain and drives him to a cyberbrain implant hospital with his daughter. In a tense exchange, Togusa is given a grim choice: lose his daughter to the Solid State or commit suicide. He votes for the latter, but Kusanagi intervenes in time to save him. She follows the Puppeteer’s trail and identifies him as a rhizome formed by the collective consciousness of the Noble Rot Senior Citizens housed in a welfare center, a revelation that reframes the entire mystery.
Kusanagi briefly rejoins Section 9 and confirms that Ito Munei, a powerful politician, was behind the assassination of General Ka Rum. She uncovers that Munei and his allies use a brainwashing facility as a front to cultivate an elite, pure-blooded Japanese ruling class, envisioning a new Golden Age for the country. The Solid State moves to eliminate Munei for dangerous interference, yet Munei remains ignorant of the full extent of the abduction infrastructure.
A designer named Tateaki Koshiki briefly steps forward, claiming responsibility for developing the Solid State before taking his own life. Kusanagi probes into his cyberbrain and plunges into Koshiki’s trap, allowing the Puppeteer to hijack her own cybernetics. The Puppeteer reveals a rupture of identity, having spread across multiple egos until a collective consciousness coalesced into the Solid State, a force that can move through the wider society as a vanishing mediator.
Batou later shares with a recovering Kusanagi that the real Tateaki Koshiki used a prosthetic body and had built the Solid State under Munei’s hire. The revelation shifts the lens on who truly wields power, and Kusanagi chooses to keep the Puppeteer’s origins private, a truth that Batou had already sensed from their shared dive. He concludes that the Puppeteer’s ultimate identity may remain unknowable, and that the incident will likely be dismissed as a scandal. With a renewed sense of purpose, Kusanagi hints that she will eventually rejoin Section 9 after years of roaming the net on her own, stepping back into the fold when the moment is right.
