Allen was dreaming again about what happened in India with his master Cross Marian three months ago. He then wakes up and hears a scream "It's an Akuma!!" and runs of towards it. Once arrived Allen ask directly about the Akuma, which he sees a crowd and one of them said that there are no Akuma's.
The one who's responsible for saying it, is a boy named Jean which according to him that there is really a Akuma. Jean then points to a homeless guy and evenly tells them what has happened. The man defending himself saying that he played with the kid and he got into it. When they leave, the Akuma sees a chance to kill Jean. Allen then activates his arm telling the Akuma that he cannot defy his eyes and purify him. Jean is happy to see an exorcist and knowing that it is a anti-akuma weapon and wants to see it.
After that Allen rescued Jean from the Akuma, the two are talking with each other while they are walking. Jean tells Allen that he want to be a scientist due to his father and that he will make a weapon that can vanish the Akuma.
He then tells Allen that he is physically weak, according to what he has seen that exorcist are normally macho's. Jean then ask Allen on how many Akuma's did he defeated, how he obtained the anti-Akuma weapon and how it was when he destroyed his first Akuma. Allen tells Jean that he must not ask too many questions. Allen then says that he must not do anything to get the creatorsattention because it is dangerous. Jean gives Allen a union bomb which explodes which the gas hits his eyes. Jean then goes to his friend telling Allen that the Akuma won't attack them all.
Jean appeared at his friend Leo's house, where he is talking with him that it has been awhile and that he has seen him since his mothers funeral. Jean noticed that Leo has changed a little bit and thinks that it maybe happened after his mother death and wonders if there is anything to cheer him up. Jean tells Leo that he saw an Akuma while he was patrolling and knew that the skeleton was a machine. He tells Leo that he also have seen it's creator, The Earl of Millennium. Jean then draws it for him and tells Leo that they will go around town and ask about him. Leo then grab Jean's hand asking him if he wants to go somewhere with him. Allen appeared at Jean's house and sees one of his maid's. Jean then pushes his maid towards Allen and ask him why he was coming for. Jean then leaves Allen which his maid still upon him. When Allen sees Leo, he tells Jean to wait, but he is gone already.
Allen entered Jean's home and sees the sketch of Jean of The Earl of Millennium on a chair. He tells before he wants to go to the order, he want to meet the Earl. Jean and Leo arrived at the cemetery which Jean thinks they came here for Leo's mother. He then collide to The Earl of Millennium which shocked him. Leo then throws an union bomb to him and tells Leo to get away from his. The Earl says that Leo is dead for a long time, ever since his mothers funeral. The Earl then says that Jean disturbed him and that Leo is the Akuma that will punish him. Jean cannot believe it, which Allen appeared telling him that it is true. Allen tells Jean that Leo is the Earl's Akuma. Allen tells Jean to believe him, because what Jean is seeing of his friend Leo now is just his psychical appearance, but deep down there lays a weapon of the Earl, the Akuma. The Earl of Millennium ask Allen who he is. Allen responds that he is his enemy. The Earl then knows that Allen is an exorcist. Allen activate his innocence cross, and start his attack to The Earl of Millennium and his purification to Leo.
While Allen tries to purify Leo's soul, he got stopped by Jean telling Allen that Leo is his friend and evenly made a promise with his that they will protect the village from Akuma's and ask Allen which proof he needs. Leo then transform into an Akuma and starts to shoot the poison bullets to Jean, but Allen protects him. The Earl of Millennium is angry about that Jean is talking about justice and all and explained about his creation.
Allen then explained to Jean that Leo used the Earl's power to get back his dead mother but it became a Akuma. Allen then says that he can see Leo's mother suffering as an Akuma. The Earl of Millennium became angry at Allen because he told him that he can see the soul within a Akuma. Allen tells the Earl that he has inherited the anti-Akuma weapon which that he can nullify the poison within him. The infection is disappearing and the Earl is in shock in what he sees. Allen then says that his left eye is a curse, and tells that he made an important person into an Akuma, which he put on a curse to him which he now can see the soul that lays within the Akuma. The Earl of Millennium then remembers his saying that he met his before. He then says that he turned his father into an Akuma.
Allen tells that he and Mana weren't related by blood, but he was the only one who adopted him after that his parents thrown him away by birth due to his left arm. After Mana's death, he made a deal with the Earl of Millennium to bring back Mana, but Mana is now an Akuma. Mana attacks Allen, cursing him by cutting at his left eye. Allen's innocence has awakened by his left arm and attacked Mana. Allen then tells Mana to run because his left arm comes closer. Mana tells Allen that he loves him and that he must destroy him. After that, he got found by Cross Marian and trains him as an exorcist. Allen then tells that this cursed is something to see the feelings of a soul within the Akuma. Allen then activates his innocence again and tells the Earl that Akuma's are sad beings which they shouldn't be existed in this world. A angry Earl says that he should kill him at the day that they met each other.
The Earl tells Allen if he can see the soul within an Akuma, and that he can save them. The Earl then tells him to try and do it and start to make a attack against Allen. Allen attacks the bullets that has been shoot from the Akuma, which Allen tells him that he managed to attack him because he was protecting Jean. He said that the anti-akuma weapon that he has possess enormous strength and speed, so a Akuma bullet or hard body has no use against it. Allen tells the Earl that it was made to destroy his weapon and claimed to be a god weapon. The Earl then summons more of his Akuma to destroy Allen. Jean then is thinking about the time that Leo was still alive, claiming that Leo is an idiot because he knew that the Earl is a bad person, he still took in the Earl. Leo then tells Allen to destroy Leo, which Allen uses his technique "Cross Grave" to destroy all the Akuma.
The Earl then escapes saying that he can't handle it at that level and tells Allen that he will see each other soon and explains more. Allen then collapsed and ask Jean to call a doctor for him. Jean is crying saying that he will call a doctor soon, and ask him if he can faint until then. Three days later, Allen ask what Jean is making. Jean tells Allen that he is creating a cross for Leo's grave when everyone noticed that he dead because Leo has been considered as a runaway. Jean then tells Allen that he's going to the Black Order, Allen says that he goes becauseTimcanpy is going crazy. Jean is going to his fathers place and study more, which the two are fist bumping telling that they both must do their best.