

Towards the end of the 19th century, Allen Walker officially joins the organization of Exorcists that destroy the beings known as Akuma; mechanic weapons made by the Millennium Earl with the suffering souls of the dead. Allen has both a cursed eye and an anti-Akuma weapon as an arm, bearing the power of "Innocence", a gift given to him as an apostle of God. Allen, along with his fellow Exorcists must put a stop to the Millennium Earl's ultimate plot that could lead to the destruction of the world and all who live on it.
103 Episodes Total• Page 1 of 5

Allen Walker and his golem, Timcanpy have recently arrived in London, planning to visit the Black Order Headquarters. Meanwhile, Officers Moore and Charles are investigating a supposedly haunted church. While searching this abandoned building, Moore and Charles are separated due to Allen's "kidnapping" of Moore. After he is handcuffed to a chair, Allen tries to explain his situation to Moore when Charles is suddenly killed. Since Moore was unconscious due to the attack, Allen is suspected of Charles's death. Allen attempts to tell the chief that an akuma killed Charles and that he would like to help. However, due to the disbelief of the chief, Allen is placed under house arrest while the rest of the police unit investigate the church themselves. During his stay at Moore's home, Allen explains to Moore about what is akuma and later on, he meets Moore's brother-in-law, Mark who is the akuma that killed Charles and countless others who visited the church. Upon investigating, Allen finds out that Moore's sister, Crea is the soul entrapped in the akuma. The akuma later kills the police units excluding Moore and later, Allen destroys it by using his Anti-akuma weapon.

Allen finally arrives at the Black Order Headquarters. Due to a misunderstanding, everyone thinks he is an Akuma. Yu Kanda confronts Allen and damages his anti-Akuma weapon. Eventually, it is resolved when Komui finds a letter of introduction from Allen's master, Cross Marian. Afterwards, Allen is allowed into Headquarters and is given a tour by Komui's sister, Lenalee Lee. After getting his arm repaired by Komui, Allen is examined by Hevlaska, an exorcist who is able to measure his synchronization ratio. In addition, she predicts that Allen will create a powerful "Destroyer of Time" in a dark future. From Komui, Allen learns more about the war between the Earl and the Innocence. Reever Wenham, the unfortunate assistant to Komui, is introduced in this episode as well. We also get a glimpse of Allen's "dark" yet comical past with Cross Marian.

After Komui wakes up from his nap, he assigns Allen and Kanda on a mission to investigate strange occurrences in the ruins of a town called Mateel, located in Southern Italy. An Innocence is discovered there, but it is in danger of being taken by the Akuma. There is a legend that a ghost roams Mateel, killing anyone who wanders near it. The ghost is somehow connected to the Innocence. Along the way, Allen talks to Toma, a Finder, who told him about how strange occurrences in history are usually related to the Innocence. Meanwhile, the Finders in Mateel capture two Akuma in barriers, but they are attacked by a third one. Shortly after the two exorcists and Finder arrive, they witness the Akuma attacking the last remaining Finders. While Allen runs to fight the Akuma and tries to save the Finders, Kanda rescues Guzol and Lala, whom the Finders protected in a barrier. During Allen's fight against the last Akuma, the Akuma evolves to Level 2. Kanda refuses to help Allen and leaves with the Mateel residents to a safe place. The episode ends with a stunned Allen being attacked by another Allen.

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.

The adventure in Mater draws to a close as Allen and Kanda discover the truth of who the Doll actually is and then battle the level 2 Akuma for possession of the Innocence.

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.

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".

Komui's latest invention, Komurin II, is designed to make exorcists stronger. However, Komurin II goes out of control and starts hunting the exorcists within the Black Order. Its all the scientists can do as they try to stop the robot from capturing Allen, and despite his experience with Komurin I, Kanda refuses to help. Meanwhile outside of the Black Order, the Millennium Earl holds a dinner with several strange humans with golden eyes and crucifixes on their foreheads, one of which is a young girl with spiky dark hair.

Allen and Lenalee are sent to investigate a town where the day of October 9th keeps repeating itself. Once there, they meet a woman named Miranda Lotto and thus learn of her significance to the strange phemonenon of the town. The Millennium Earl announces to his family, the Noah Clan, that it is time for them to head out and continue their mission, thus leading one of the Noahs, the young spiky haired girl Road Kamelot, to investigate the Rewinding Town.

Allen and Lenalee resolve to help Miranda in order to prevent time from repeating itself. Unbeknownst to them, Road has been watching their every move and has special plans for them.

The terrible realization that Road Kamelot is a human horrifies Allen, who cannot understand why a human and akuma work together. The talking umbrella Lero chastises Road for going against the Earl's plans, but Road points out this little incident was only to 'spice things up'. To prove herself as different from regular humans, Road stabs herself with Allen's Innocence, only to recover right in front of him quickly. She stabs Allen in the cursed eye, and makes to kill Miranda, but Allen rescues her. Through this Miranda has a realization about herself, which causes a reaction from the Innocence.

Thanks to Miranda's Innocence, Allen and Lenalee temporally recover and fight for survival against Road and her Akuma. Just when things seem to be going well, Road decides to torment Allen by ordering an Akuma to self-destruct, explaining that an Akuma who dies this way will never be saved and their soul will be forever lost. Desperately, Allen tries to exorcise the Akuma before it happens, but Lenalee stops him, and the Akuma explodes. The soul is seen begging for Allen's help, and he takes out his anger on Lenalee, who slaps him before telling him as a friend she had to stop him. Road laughs at the scene before leaving, and Allen tries to stop her, but is unable to bring himself to kill the Noah. Road leaves the dimension promising Allen that they will meet again. The Exorcists, along with Miranda, return to Miranda's home.

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.

Allen, Lavi and Kanda are sent to investigate a mysterious rapid snowstorm, which could be due to Innocence. Here they meet a young girl and her father, who is obsessed with finding something called The Leaf of Revival to bring back his dead son. Meanwhile, also searching for a possible Innocence in the same area are three Level 2 Akuma under the command of a Noah named Skin Bolic.

Allen, Lavi and Kanda continue their search for the Leaf of Revival, which they assume to be the Innocence. After realizing it is Innocence after all, the three Level 2 Akuma attack to retrieve it from them.

While searching for an Innocence in Rome, Kanda encounters a mysterious swordsman named Victorio, whose power is unbelievably strong. When Kanda hasn't returned after a while, Komui asks Allen and Lenalee to go to Rome to investigate why Kanda is taking so long, thus they learn the history of Victorio and the Princess, whom he vowed to always fight for.

Allen, Lenalee and Kanda find themselves in a predicament when they battle Victorio. How can they stop someone who apparently cannot die from shear wounds?

Seeing Lenalee and Russell going out together, Komui assumes that they are dating and in rage, chases after them with his newly built, Komurin v2. Concerned, Allen, Lavi and the Science Division work together in an attempt to stop his reckless behavior. Meanwhile, an Akuma with amazing transformation skills has targeted Lenalee, but keeps being on the receiving end of Komui's explosive inventions.

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.

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.

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.

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 finishing the mission that General Cross left for them, Allen and Lavi accompany Krory back to Headquarters so he can be inducted as an official exorcist. Krory is inexperienced to the outside world, and is very easily deceived by others. He soon gets hustled in a game of cards by a rag tag group of three men, and Allen proves his cheating skills when he wins everything back. One of the men, Tyki, gives Allen a pack of cards before they leave; but this Tyki is soon revealed to be an ally of the Millennium Earl and a Noah.