England is a country encircled by water on every side. When faced with an assault from an unknown foe, the nation swiftly descends into disorder. England's sole salvation lies in a protector named Arthur, chosen by the blade Excalibur. His unwavering resolve keeps the realm safe from every looming threat that endangers it.
Yet this designation was not reserved for a single champion. As the sacred sword judged challengers worthy, their count swelled to millions. These Arthurs carry out their duty as guardians in the endless battle against death.
Conversely, some bear a distinct task from these Arthurs. 'Annihilate Excalibur.' These fighters are called AGENT Arthurs.
To eliminate a million Excaliburs, they wield the sword itself. They are Arthurs, yet not true Arthurs. This is a story of revolt for those striving to avert the world's impending doom.
