Following the September 30th Kazakiri incident, protests against Academy City erupt across Europe, and things are restless within the city, as well. Kamijo must stay after school as punishment after getting into a fight with his classmates.

Confronted by Terra, Kamijo and Itsuwa have their hands full trying to avoid his attacks. Military forces from Academy City appear in Avignon, suppressing the demonstrators. Terra uncovers the secret Kamijo has been hiding.

Tsuchimikado apprehends an underworld arms broker, and a search of his apartment leads to information about an assassination plot. But there is more to the scheme than it originally appears, as several other teams go into action.

Accelerator continues on his way to the satellite control center, but is blocked by Saraku, a MEMBER agent. The BLOCK team, with the help of 5000 hired mercenaries, attempts to break into a heavily-fortified municipal facility.

While Hamazura is out running errands for Mugino, SCHOOL stages an attack on ITEM. When Mugino runs from Kakine, Takitsubo offers to protect Hamazura, but ends up needing his help instead. Kakine issues a challenge to Accelerator.

A threat from Acqua against Kamijo leads Itsuwa to come to Academy City as his live-in bodyguard. Index, Kamijo and Itsuwa visit a spa in the third level of the complex beneath the 22nd School District. Mikoto frets over Kamijo's amnesia.