The Golden Dawn was hard at work trying to get the kingdom back onto its feet. They were trying to make amends for the trouble they had caused while they were possessed. Captain Vangeance puts Alecdora Sandler in charge of a mission. Alecdora can’t hide his dislike for Yuno so he tries his best to earn more merit than him.

While the Clover Kingdom was trying to get back onto its feet, the citizens learn that the one behind the destruction of their homes is called the devil, and many of them grew to hate the devil. Some of these people had gathered and created a group called the Devil Banishers. Because the Magic Parliament did not immediately punish the supposed servants of the devil, they decide to go after Asta and Nero and take matters into their own hands.

After being attacked by the Devil Banishers, Nero as well as Gauche’s younger sister, Marie, were kidnapped and Asta fell into a mysterious coma. Gauche thinks that maybe the head of the Magic Parliament, Damnatio, may have taken his sister, but Damnatio denies the claim. Damnatio’s innocence is proven by using Marx’s communication magic, but they learn that there’s a possibility that Damnatio’s subordinates are behind this incident. Meanwhile, Asta was taken to Owen’s clinic and it becomes apparent that the tracking device he had on his arm had disappeared. They then find its signal coming from somewhere rather unexpected.

Julius orders the Black Bulls to save Nero and Marie, so Captain Yami, Noelle, Finral, Gordon and Gauche travel to a certain town along with the captain of the Silver Eagles Nozel, to see if they can find any clues. They try to ask the townspeople for some clues, but it appears that they are less than willing to cooperate because they seem to hold a grudge against the Magic Knights who weren’t able to come to their immediate aid after they were attacked by the elves.

The Devil Banishers announce that they will judge Nero and Marie in public. Julius then orders the Black Bulls and other Magic Knights to go rescue them. The Magic Knights place themselves among a crowd that clearly hates the devil, and then the Devil Banishers appear. They then demand that the devil-possessed Asta show himself.

Though the Magic Knights were able to save Marie from the Devil Banishers, Nero is taken once again and Asta’s 5-leaf clover grimoire is also stolen. Suddenly, they receive a message from one of Damnatio’s subordinates and learn the true identities of the Devil Banishers and Julius orders the Black Bulls yet again to save Nero. The Black Bulls begin their investigation in the town where they think the Devil Banishers were gathering. Will they be able to find out what the enemy’s true motive?

Asta, Noelle, and Magna manage to catch up to the Devil Believers who had taken Nero. But they find that the Devil Believers have now grown in numbers. Magna goes back to tell Yami of the situation. Asta and Noelle are left behind and try to do what they can to save Nero. But it appears that the Devil Believers have made up their minds on achieving their goal, even if it costs them their lives.

Months after arriving at the Heart Kingdom, Asta still doesn’t have any magic, but he’s become more powerful at an alarming speed due to his training with the Spirit Guardians. Anti-magic is one of the magic attributes that falls into the “Arcane Stage” and is needed to defeat the devil. And because of that, Gaja asks Asta how exactly he obtained the five-leaf grimoire.