During the Edo period, a gifted swordsman was exiled from his clan when he questioned the misconduct of his leader. Years after, his dying wife wish was for him to go back to his clan.

Set 18 months after movie "Library Wars." After the government's enactment of the Media Betterment Act, battles wage between the Betterment Squads and the Library Defense. The Library Defense resists censorship and advocates freedom of expression. The biggest battle awaits for the Library Defense.