Ex-soldier Juzo Inui has one question&;who turned him into a cyborg and erased his memories?After the war, cyborg soldiers known as the Extended were discharged. Juzo Inui is one of them, a man whose body was transformed, his head replaced with a giant gun. With no memory of his previous life&;or who replaced his head and why&;Inui now scratches out a living in the dark streets of the city as a Resolver, taking on cases involving the Extended.When you were created as a tool of a megacorporation, can you ever escape its grip? Juzo hasn&;t got an answer to that question just yet, but he&;s determined to live his life for himself. Too bad for Juzo that the agents of Berühren have other ideas. A man claiming to be Tetsuro&;s brother wants to test a new version of Berühren&;s Harmony device, and Juzo and Tetsuro are the guinea pigs. Survival means Juzo will need to unleash his full capabilities as a Gun Slave Unit, but this time that might not be enough...