In 2035, justice comes at a price. With no laws and no police, bands of vigilantes are the only force protecting the people of Leeds from a tide of evil. When Jack Moon discovers his beloved cousin is the victim of an abusive relationship, he finds himself without the means to hire a savior - and must spill blood with his own hands. In doing so, Jack attracts the attention of the Killer Assassins Association, an eccentric gang of professional peacekeepers who invite him to join their ranks and help defend the city against a nefarious narcotics organisation. Adopting the guise of Kuro the Black Knight, the fearless swordsman of his favorite anime show, Jack embarks on a twisted journey to become the hero of his dreams.