Deunan and Briareos, former soldiers, reunite and team up to survive in a devastated city after the global conflict.
Deunan and Briareos encounter the massive Oroboro barricade, a technological barrier protecting the last standing city, hinting at the possibility of advanced civilization still existing.
Deunan meets Iris, a child-like cyborg, who provides crucial help by decoding complex data sequences, bringing hope to understand the technology behind the barricades.
Deunan and Briareos infiltrate the city protected by the Oroboro barricade to uncover the secrets of its advanced technology and the true state of humanity.
They face bioroids, humanoid robots maintaining order within the city, leading to a clash that questions the ethics of controlling humanity through artificial beings.
The protagonists discover the motives and manipulations of the New United Nations forces attempting to control post-war society via robotic enforcement.
Deunan, Briareos, and Iris fight to protect the future of mankind from being enslaved or destroyed by artificial control and authoritarian rule.