Index has returned toLondon on the orders of the English Puritans, only to find herself in the centerof a coup-d'etat spearheaded by the Knights! After they seize most of the UK,the entire country is put under martial law while the sorcerers of the Puritanfaction continue to resist. As the civil war rages, Touma Kamijou followsIndex's trail to Folkestone where he unfortunately runs directly into themastermind of the coup herself, the second princess Carissa...and God's RightSeat Acqua?!