A Certain Magical Index, Vol. 15 (light novel)

Academy City's peacekeeping forces are absent due to the Avignon invasion. In that now lawless land, shadowy groups start moving behind the scenes.
--Those acting for their own interests.
--Those who love the dark and revel in killing.
--Those trying to destroy others' hope.
--Those standing up in defiance for those important to them.
--Those bringing the battle to the higher echelons.
--Those quelling rebellious elements.
--Those who would stop a rampage with violence.
In this city, which controls all of science, who will survive?