The head of the English Puritan Church, Laura Stuart, has summoned theIndex Librorum Prohibitorum with a mission to investigate the bombing of theEuro Tunnel that connects the UK with France. Index soon departs for the BritishIsles with her guardian Touma Kamijou in tow but their when their flight issuddenly hijacked by a mysterious figure, their plans will have to change! Ifthey survive, Index and Touma's next unfortunate adventure will lead them to theheart of the UK!