In a gritty, cyberpunk future recovering from a devastating world war, humans known as Extended have heavily modified their bodies into lethal biomechanical weapons. Juzo Inui is one such Extended, bearing a massive revolver for a head and amnesia concerning his past. Making a living in the sprawling metropolis as a "Resolver"—a private investigator dealing with dangerous cases involving rogue Extended—Juzo spends his days smoking cheap cigarettes and seeking answers about his forgotten origins. His mundane existence is upended when a frantic, high-ranking rogue Extended bursts into his office, clutching a kidnapped, biologically engineered boy named Tetsuro Arahabaki. Before dying, the fugitive begs Juzo to protect the child from the powerful Berah Beyond Corporation, which uses Tetsuro’s unique abilities as a living remote-control interface for the formidable, mechanized weapon, the Pepper Box. Driven by a stern moral code, Juzo takes Tetsuro under his wing, plunging himself into a vast corporate conspiracy. As they navigate the dangerous underbelly of the city, they forge an uneasy alliance with Mary Steinberg, an underground doctor who despises the tech-obsessed corporations, and a cunning
intelligence officer named Olivier. The trio uncovers a sinister plot orchestrated by the sprawling conglomerate Spitsbergen, which is weaponizing the citizens and exploiting the marginalized Extended population. Tetsuro’s terrifying capability to hack and control any Extended body from a distance makes him the ultimate target, forcing Juzo to continually risk his metallic life to shield the boy. Throughout their perilous journey, Juzo confronts remnants of his own forgotten military past, particularly his involvement in the creation of the catastrophic Extend technology. He battles terrifying, genetically altered assassins and corrupt corporate executives who will stop at nothing to capture Tetsuro and harness his power for global domination. The conflict intensifies as Juzo learns his own gun-head was engineered by the corrupt system he now fights. Alongside Mary and Tetsuro, Juzo wages a relentless war against the oppressive forces ruling the city. As secrets unravel, Juzo realizes that protecting Tetsuro is not merely a job, but the key to reclaiming his own humanity and exposing the dark truth behind the sprawling metropolis. Ultimately, Juzo must pull the trigger on his own past, facing off against the architects of the war to secure a future where both humans and Extended can finally coexist in peace, free from the tyranny of
corporate control.