"Ghost in the Shell: SAC_2045 Sustainable War" is a continuation of the "Ghost in the Shell: Stand Alone Complex" series, set in a near-future world where cybernetic enhancements and artificial intelligence are deeply integrated into society. The story unfolds in 2045, a time marked by economic collapse and global instability, leading to a state of "Sustainable War"—a perpetual, low-intensity conflict driven by nations and corporations to maintain economic control. Public Security Section 9, a specialized counter-cyberterrorism unit, is reactivated to address emerging threats in this chaotic landscape.

The narrative centers on Major Motoko Kusanagi and her team, including Batou, Togusa, Ishikawa, Saito, Paz, and Borma, as they investigate a series of high-profile cyberattacks linked to a mysterious group known as the "Post-Human Threat." These post-humans are individuals who have transcended human limitations through advanced cyberization, gaining superhuman abilities and the capacity to manipulate digital and physical realities. Their actions disrupt global systems, raising questions about the future of humanity and the ethical implications of technological evolution.

As Section 9 delves deeper, they uncover a conspiracy involving the manipulation of economic systems, the emergence of a new form of intelligence, and the potential for a post-human singularity. The team must navigate complex moral dilemmas, confront their own identities in a world where the line between human and machine is increasingly blurred, and decide how to respond to the existential threat posed by post-humans. The series explores themes of identity, autonomy, and the societal impact of rapid technological advancement, staying true to the philosophical underpinnings of the "Ghost in the Shell" franchise.