Even though Allen's body is half decomposed and he still hasn't been able to revive his Innocence, he returns to the Level 3's location in order to save Fo.

The Black Order suppresses the Akuma forces at Barcelona, but many are lost in battle. As Allen and Lenalee set off to find General Cross, Tiedoll searches for new recruits.

Swarms of Akuma track General Tiedoll to Barcelona, and Allen and Lenalee race towards the besieged city in a fleeting attempt to save their comrades.

Devastated by what he just learned about Eliade, Krory decides to fight her, despite his feelings toward her. Finally, Eliade is defeated and Krory decides to become an exorcist.

After General Yeegar's tragic death, Allen, Lenalee, Lavi and Krory are separated into two groups and sent to look for General Cross and guard him from the enemy. During this time, Allen tells Lenalee his bitter memories of Cross and the tragedy of a good friend.

Now that Allen's Innocence has been revived, he wants to rejoin his comrades as soon as possible and tells Bak that he'll take the teleporting device the Level 3 took to the Asian Branch.

After failing in their mission to capture Cross Marian, Jasdero and Devit decide to wait for him in the ark and to kill time by going after his apprentice Allen.

The Froi Tiedoll unit arrives in Edo. The General tells his apprentices to go help Lavi and the others, who continue to struggle against the huge Akuma and Tyki Mick.

A Level 3 Akuma whose dark matter holds the power of decomposition has invaded the Asian Branch base. As Allen still cannot activate his Innocence, Bak and the others try to protect him.

While on a mission to search for General Cross, Allen is beseeched by several villagers complaining about a "vampire problem." Soon after the ruckus, Lavi and Bookman join Allen on his new mission.

The Millennium Earl is seen bouncing about cheerfully, answering several phone calls and confirming business deals. Allen and Lenalee arrive at Liverpool to meet Mother, who took care of Allen during his training years with General Cross, to ask her about his master's whereabouts. Both exorcists soon discover akuma in the area and a possible conspiracy at a local hospital.

The difference in power between Allen and Tyki is so great that Tyki easily knocks Allen down. Meanwhile, Lavi suffers and faces illusions in a dream created by Road.

Lulu Bell dons a disarming disguise and leads Krory into a desert ambush, setting into motion her devious plan to divide and conquer Allen and his comrades.

When Allen comes upon a piano in The Fourteenth's secret room, he suddenly starts hearing a song in his head and, much to his own surprise, finds himself playing it.

Allen crosses paths with Yeeger - the oldest general in the Black Order. After a fierce battle, a generous meal, and a heart-rending story of loss, the exorcist’s spirit is renewed.

Continuing their search for General Cross, Allen and Lenalee get attacked by Akuma and bump into a group of Finders. Meanwhile, at another breakfast gathering, The Millennium Earl announces to the Noah Clan that he's come up with a plan to get rid of the exorcists. He gives Tyki, Jasdero and David (Twins), and Skin a card with names on it of whom he'd like them to kill and get rid of.

Allen and Lavi decide to investigate Arystar Krory, the vampire who is supposedly terrorizing the village. They head up to Krory's castle and meet his beautiful lover, Eliade.

Just when the Millennium Earl is about to snatch Lenalee, Allen arrives to rescue her. In the midst of a fierce battle, the Earl and Noahs suddenly disappear.

While Allen comforts Lisa as she mourns her sweetheart's death, Lenalee investigates the cause of why there is a large quantity of akuma in the area, thus revealing the work of a Broker, who sells souls to the Millennium Earl. There are two suspects, the chief doctor, and a young money-hungry one. Working undercover as a nurse, Lenalee is determined to find out who.

The exorcists embark on a perilous mission to transport Mei Ling to headquarters, but Lulu Bell of the Noah Clan has a surprise waiting for them.

When Allen and Lavi discover the truth about Krory's attack on the villagers, he appears before them with an intention to fight, thus leading to a rather fierce battle.

While Lavi and Krory continue their battle outside the castle, Allen finds out the truth about Eliade.

Lavi and Krory are sent to protect Allen and Lenalee as they continue to look for General Cross. Their search is interrupted when Akuma attack a festival of roses.

Stranded on a rain-drenched night, Allen and his friends are lured into a trap by a black cat, but a growling stomach may prove to be their saving grace.

The huge body of Suman begins to deteriorate and Allen wastes no time activating his Innocence, but unfortunately, his arm begins to grow in intense pain as he tries to remove Suman's Innocence. Miraculously, Allen manages to get Suman and his Innocence out of the body. Unfortunately, Suman is still alive but his mind has gone dead. Then......!

A violent battle ensues with Allen and Bookman fighting Lulubell's army of Level 3 Akuma, while the science department is slowly turned into a colony of Skulls.

Allen longs for a father figure to illuminate his path in life, and the Millennium Earl rouses the Clan of Noah to search for the Heart of Innocence.

The battle with Road is finally over and Allen is unsure on his reasons for becoming an exorcist, but after meeting a new exorcist partner, Lavi, his sense of reason returns to him by understanding the significance of wearing the exorcist uniform.

The Millennium Earl says nothing can be done now that the "heart" of the ark has been transferred to the new ark, but Cross has other ideas.

In the last room, the battle between Allen and Tyki Mikk begins, while Road tells Lavi to play with her if he wants to win the freedom of Lenalee and Chaozii.

The fight between Kanda and Skinn begins. When Kanda realizes that his attacks are barely affecting Skinn, he decides to use the powerful Sangen Style technique. Meanwhile, the room starts collapsing.

Evil is spreading across the globe, and young exorcist Allen Walker is humanity’s greatest hope to survive the gathering storm.

Allen still feels like a stranger at Black Order headquarters, and the young exorcist just can’t shake the feeling that he is being kept in the dark about certain happenings.

Allen continues his battle with an Akuma that has leveled up and gained the power to take on a person's appearance and powers. Meanwhile, Kanda hears from the "Ghost" of Mater the history of the town and the Dolls they made to cheer themselves up.

After the ark returns to its original shape, Allen and the others go back to Edo, to the Asian Branch, and finally, to the Order's headquarters, where they are joyously welcomed back by the Order's staff.

Trapped in an iron maiden, Krory is beginning to lose consciousness when he hears the voice of the woman he loved. Meanwhile, Allen and the others arrive in the last room.

Allen's innocence still hasn't resumed a physical form despite his continued training with Fo. However, some changes are observed. Could they be a clue to the revival of Allen's innocence?

The Noah within Tyki Mikk was supposed to have been destroyed by Allen; however, he has transformed into a dreadful figure and starts attacking Allen and the others.

When Allen remains unable to activate his Innocence, Bak comes up with a strategy to arouse his Innocence by creating a sense of crisis.

After a difficult journey, Allen reaches Black Order headquarters, but the scar above his left eye doesn’t prompt anyone to roll out the red carpet.

On his way back to the Black Order headquarters from Mater, Allen meets a boy named Jean. Jean and his friends have organized a patrol to search for Akuma within the town. Allen warns the boy that this is dangerous, but Jean won't listen.

In one of the rooms in the ark, Allen and the others encounter Skinn Bolic, a member of the Clan of Noah. Kanda declares that he will fight Skinn while the others move forward to find the next door.

While the Noahs mourn Skinn's death, Allen, Lenalee, and the others move forward, believing that Kanda is okay and will catch up with them soon.

Lenalee continues her one-on-one fight against Eshi, a Level 3 Akuma, while other Akuma attack the ship from the sky.

Lenalee, Lavi, and the others have finally arrived in Japan. However, when three Level 3 Akuma appear, the group decides to hide rather than risk fighting them.

Driven by suspicion, Lenalee’s brother unleashes Sir Komlin the Third. As the giant robot wreaks havoc, a threat with intentions born of the world’s greatest evil goes unnoticed.

Determined to do anything it takes to restore his Innocence, Allen begins his training with Fou, doing battle with her while constantly trying to activate his Innocence to fight. Meanwhile, General Klaud Nine and General Winters Sokaro return to the Black Order upon news of the deaths of their exorcist units.

Seeking the Heart of Innocence, the Clan of Noah savagely hunts down Black Order generals. Meanwhile, Krory prepares to embark upon his first solo mission.

A Level 4 Akuma has finally been born. Allen attacks it relentlessly, even though its overwhelming presence sends a shiver through his body.

Not knowing the status of the Exorcists in Lab 5, Komui decides to have all headquarters personnel evacuate. Meanwhile, Rouvelier takes Lenalee to Hevlaska.

While waiting for a ship to rendezvous with Lenalee, Allen encounters a group of wannabe pirates who claim that a pirate ship is sinking ships along the coast.

Allen sets out to recover Innocence discovered in southern Italy. When a powerful Akuma attacks him, the exorcist comes face to face with something eerily familiar.

Allen regains consciousness, surprised to find himself still alive. Bak Chang, the Chief of the Black Order's Asian Branch, explains how he survived.

Allen and Lenalee investigate a town where time repeats, but a gang of Akuma is hell-bent on making sure they recover the missing Innocence before the exorcists do.

Lenalee, floating in darkness, remembers Allen and what she said to him concerning her view of the world. Afterwards she pushes herself and her innocence to the limits and even exceeds them, defeating Eshii in the process and disappering once again.

As she is on her way to reunite with Allen, Lenalee agrees to accompany Gozu to the next town. However, in the midst of the forest, they meet a group of stranded villagers, running away from their home because of wolf attacks. The wolf attacks are revealed to be the work of Akuma and Lenalee receives help from Suman Dark, an exorcist and long time friend, who is searching for General Zokalo.

General Tiedoll enjoys painting the beautiful scenery he encounters, but Kanda is eager for action. Perhaps an Akuma outbreak at an unusual castle will satisfy both of their needs.

Allen continues to train with Fo in order to revive his Innocence, without much improvement. Some members of the Asian Branch start questioning the necessity of keeping Allen within their base.

Allen exorcises numerous Akuma but they won't stop coming at him, their aim being to prevent the exorcists from reaching the egg. In the meantime, Lulu Bell opens a new gate that will take the kidnapped Allen and the egg back to the Earl. Will she be able to make a clean escape?

The "Trick Glasses" created by Jasdero and Devit's ability make it difficult for Allen and Krory to fight them. Meanwhile, Lavi tries to find the lost key.

While being burned by his own attack, Lavi asks his illusion for what purpose Bookmen exist and why wars never disappear from the human world.

Allen's past is revealed as he confronts the Earl of the millennium, who wants to kill Jean for causing problems with his patrol and calling the Earl "a bad guy".