Allen Walker, along with the other Exorcists-- people possessed by God-- must prevent the end of the world by fighting and defeating the Millennium Earl, demons, and evil using the special substance known as "Innocence."

"Believing he's finally taken care of Tyki Mikk, Allen is brought up short by Road and presented with a stark choice--if he wishes to rescue Lenalee and Chaoji, he must destroy his friend Lavi! Allen refuses to do it, little realizing that the choice is not what it seems. Lavi knows what's up and may be the only person who can turn the tables on Road. Has Road, however, destroyed Lavi's will to resist?" -- page [4] of cover.

"Lenalee is determined to confront a Level Four Akuma that's out to kill Komui, but her only chance is to reclaim her Innocence and synchronize with it. The Level Four is not inclined to wait around and pursues its mission even against the best efforts of Lavi and Kanda. It's left to Allen to hold the line, but it soon becomes obvious he has no hope of doing it all by himself!"--p. [4] of cover.

"Following a brutal battle with a Level 4 akuma, Allen seems to be undergoing an odd and disturbing change. Meanwhile, a new breed of Exorcist is introduced at Black Order headquarters and, at Asia Branch, Kanda learns some disturbing things about his own status in the Black Order's Exorcist operations. Needless to say, Allen and his friends are ill prepared to deal with the simultaneous appearance of the servants of the Millennium Earl all over the...

An experimental virus is turning members of the Black Order into zombies! It's up to Komui, creator of the virus, to deal with this disaster. Can he figure it out while also contending with a vengeful spirit eager to see the virus complete its rampage?

Cross Marian is preparing to finish off Tyki Mikk when Millennium Earl interrupts with a plan to build a new Ark by using data downloads from the old one, and Allen is instructed by a strange apparition to play the piano even though he has never had lessons.

Allen and his fellow exorcist, Yu Kanda, discover the latter's background, including his true nature and purpose - in visions that flash back to his childhood.