In London, the women's dorm in a magicians' base get wild, while in the underbelly of Academy City, Accelerator stumbles upon someone who has been waiting for him all this time.

After rescuing Muno Barony from disaster, Satou and crew head for dwarf territory and rescue an Oracle priestess from the demons! But for some reason, the attacks just keep coming...

Showdown in Castle Town! Having successfully averted the airship attack, Satou and company arrive safely in the royal capital. There, they are reunited with Nana’s “sisters”—Numbers 1 through 8—and give them the gift of a lifetime. But as is tradition with every trip to the capital, Satou must rub elbows with the aristocracy before he can enjoy his sightseeing. He even receives a surprise visit or two, including a summons from Sir Juleburg of the Eight Swordsman of Shiga! Because no leisurely trip would be complete without a friendly duel…

A certain unlikely hero...Only Komoe's class would let a regular conversation spiral out of control into a grand-scale hot pot party. It's an open question whether her students are a blessing or a curse. Meanwhile in London, the English Puritan Church's facilities should generally be a place of prayer and quiet contemplation...So who's going to take responsibility for the chaos unfolding in the sisters' dorms?! Back in Academy City, a certain railgun's mother has suddenly popped in for a visit, which is more than enough to make even a Level Five esper panic!

A certain unlikely hero... It’s another exciting, messy time in Academy City as Uiharu repels a massive hacking attack on the data banks. Elsewhere, Hamazura, Hanzou, and Komaba speed away from the scene of their most recent crime, only to quickly regret their choices after one cop makes it her life’s mission to catch them—no matter the cost in property damage. Meanwhile, in the dark underbelly of the vaunted scientific city, Hanzou must come to terms with his dark lineage or face the consequences. And in that same shadowy world, several Misaka Sisters have gathered for their next mission to…look up their horoscopes?

Ririchiyo has decided to make a fresh start, removing the blinders from her eyes and releasing Soushi from his contract. From now on, she has resolved to treat this incarnation of Soushi as his own person and to mourn the loss of the man she loved in a previous life. The change has given Ririchiyo a clear perspective, but Soushi's heart remains clouded. Playing the part of his former self for Ririchiyo's sake was an act--what will happen when Soushi's true feelings come to light...?

Kanzaki Kaori is on the hunt for the culprit who murdered her jeans while Kamijou Touya is on the hunt for a good souveiner from Milan. Elsewhere, Kuruwa begins to fall for Hanzou. At the same time, Hamazura is most definitely not in love with Kinuhata, movie date or not. In the background, the Misaka Sisters' latest obsession is fortune-telling with blood types. The world of science and magic never ceases to be an exciting, hot mess...