In 2029, Niihama City has evolved into a technologically advanced metropolis. Thanks to significant advancements in cybernetics, citizens can replace their limbs with robotic components. The world is more interconnected than ever, and the city's Public Security Section 9 is tasked with fighting corruption, terrorism, and other dangerous threats arising from this shift toward globalization. Major Motoko Kusanagi of Section 9, a strong-willed leader, heads a case involving a mysterious hacker known only as the "Puppet Master," who leaves behind victims stripped of their memories. Like many in this futuristic setting, the Puppet Master's body is almost entirely robotic, granting them immense power. As Motoko and her subordinates track the enigmatic criminal, other groups—including Section 6—begin to intervene, compelling her to face the case's extreme complexity. While pondering philosophical questions, such as the meaning of her own life, Motoko soon realizes that the one who will provide these answers is none other than the Puppet Master themselves.