The head of the English Puritan Church, Laura Stuart, has summoned the Index Librorum Prohibitorum with a mission to investigate the bombing of the Euro Tunnel that connects the UK with France. Index soon departs for the British Isles with her guardian Touma Kamijou in tow but their when their flight is suddenly hijacked by a mysterious figure, their plans will have to change! If they survive, Index and Touma's next unfortunate adventure will lead them to the heart of the UK!
Touma has been called out by Mikoto to fulfill his punishment, but can anyone call taking pictures together and getting matching cell phone straps "punishment"...? The arrival of Mikoto's "little sisters" makes their "battle" even more fraught!
A certain unlikely hero... As battles rage around the world, three boys continue to dash through the fires of Russia. Takitsubo is still suffering, and with no cure in sight, Hamazura relies on a chance encounter and a borrowed jeep to find what he needs in Elizalinan territory. Already there is Accelerator, who awoke in a field hospital after his defeat at the hands of his weakest and most worthy opponent. Though Last Order is no better than before she and Accelerator arrived, it might be just the right place to learn how the occult parchment ties into everything. Back across the border in war-torn Russia, Kamijou is about to infiltrate another military base to finally corner Fiamma. That's easier said than done, though, when two enormous angels turn the entire area into a battlefield!
Kamijou Touma faces his roughest challenge yet--a classroom hot pot party! Meanwhile in London, the women's dorm in a base of magicians may never see another day as wild as this one. And in the underbelly of Academy City, Accelerator stumbles upon someone who has been waiting for him all this time...? Here begins the supplementary SS series of A Certain Magical Index!