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After the preparations are completed, the ship begins to set sail. In the distant horizon, Allen's left eye picks up legions of Akuma, both level 1 and 2, approaching the ship from the horizon. Realizing a massive attack, the exorcists prepare for battle. However, they soon discover that they are not the intended target...

When Allen and Lenalee realize what became of Suman Dark, an Exorcist who went missing after his unit was attacked, they decide to rescue him.

Recognizing the enormous and uncontrollable white object as fellow exorcist and good friend, Suman Dark, a horrified Lenalee wonders how he became a Togaochi (Fallen). The legions of akuma continue to assault the huge Suman, but fail. Allen and Lenalee desperately try to discover how to stop Suman's Innocence from insanity.

Allen attempts to stop Suman from destroying a nearby village by increasing his Innocence's synchro rate to its maximum power. While struggling to stop the Togaochi, Allen's Innocence returns to normal and is severely damaged, causing him intense pain. Meanwhile, Lenalee learns the truth of a Togaochi and Suman's fate from Komui.

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......!

Samo Han Wong from the Black Order's Asian Branch brings word that Allen has been found and Lenalee and the others need to leave for Japan without him.

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

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

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.

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

Remembering that Allen released his Innocence forcibly to save Suman, Lenalee decides to do the same to save her "world."

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.

While Lenalee is fighting the level 3 akuma, the sailors and exorcists on board the ship are trying to protect it from other akuma. After finally defeating them, they now wait Lenalee's return anxiously.

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.

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.

Despite their best efforts, Lenalee and the others are unable to avoid the three Level 3 Akuma pursuing them. Just when they think they have no choice but to fight, an unexpected development occurs.

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?

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.

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.

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.

While Allen prepares to go to Edo, Lavi and the others are having difficulties fighting huge Akuma.

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.

The black energy wave drawn out by the Millennium Earl swallows the city of Edo and causes further injuries to the members of the Cross unit.

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.

Lenalee is sucked into a star-shaped hole that suddenly appeared. When Allen tries to grab her hand, he also falls into the hole... and so do some other Exorcists.

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.

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.

Never forgive Innocence... Never forgive Exorcists... Skinn's anger and animosity keep him alive and push him to further attack Kanda.

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.

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 "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.

Jasdero and Devit have merged and become Jasdevi. Jasdevi is so overwhelmingly powerful that Allen, Lavi, and Krory have a hard time fighting him.

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.

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 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.

Amidst great crisis, Allen's synchronization with his Innocence becomes stronger than ever, which results in his left arm turning into a large sword.

Lavi is trapped in the world of dreams created by Road. There, he's attacked by the people at the Black Order, including Lenalee and the other Exorcists.

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.

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.

After transforming, Tyki is completely in a different league from Allen and Lavi; however, they continue to fight against him. Then someone unexpected appears to rescue them.

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.

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.

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.

While the Order's staff celebrates the return of the Exorcists, Director Rouvelier, a Special Inspector from the Central Agency, holds an advisory council meeting to question Cross Marian.

Howard Link comes to see Allen and declares his intention to keep an eye on him. Surprised by the news, Lenalee goes to see Komui in his office, where she's greeted by Director Rouvelier.

Lab 5, where the egg is situated, is now under attack. Detecting the Akuma, Allen and some others rush to the lab, where they are stymied by a wall blocking the entrance.

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 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?

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.

Determined to protect her brother and the others at home, Lenalee drinks her Innocence in order to synchronize. Meanwhile, Allen pushes through his serious injuries in order to continue fighting the Level 4.

After Allen and Lenalee defeat the Level 4 Akuma, Cross tells Komui to cancel the evacuation. However, the cancellation may be premature…