It is the year 2017, and Europe is being invaded by the forces of the Holy Britannian Empire. In an attempt to combat the opposition's overwhelming pressure and put an end to the massive casualties, the army forms a special unit called Wyvern, or W-0, composed of former Japanese citizens referred to as "Elevens." Recruited from ghettos, these young men and women pilot Knightmare frames—humanoid war machines—into dang...