Two years have passed since the fight between Mortlach and Percival...The Four Knights of the Apocalypse having lost one of their own, the Knights of the Chaos give themselves to Britannia with great joy, nothing seems to be able to prevent them from ravaging the land and capturing the inhabitants. But in the midst of this marasm, a few people continue to struggle by infiltrating Camelot, in the middle of enemy territory. A young girl claims to herself from the Percival squad of the Four Knights of the Apocalypse. The second arch, that of the counter-attack, opens on her exploits!