A masked man releases toxic miasma while fleeing from Exorcists, taking a boy named Satoru hostage. Rin and Shura join Yukio at the scene, where Saburota Todo, director of Deep Keep, reports that the left eye of the Impure King was stolen. The masked man retreats into a building with Satoru. Yukio and Todo enter to investigate, with Rin later following without permission. They discover the thief is a miasma decoy and the stolen eye is fake. Todo suddenly betrays the brothers, revealing his demon
The Exwires are dispatched to aid injured Exorcists recovering at the Suguro Family Inn. Rin, eager to help, is assigned menial trash duty, a reminder of the lingering distrust toward him. While out, he meets an older man slicing watermelons named Tatsuma Suguro, who is Ryuji's father. Rin is surprised by Tatsuma's kind nature, contrasting with Ryuji's tension toward him. They briefly bond before Tatsuma abruptly leaves. Inside the inn, a clash breaks out between the Hojo sisters and Juzo Shima.
Ryuji wakes up with little memory of the previous night, as he also unknowingly drunk Shura's beer, and shares breakfast with Miwa as they ignore Rin. Renzo greets Rin, who is equally confused about the prior night. After breakfast, Rin asks Ryuji's mother for candles to help practice controlling his flames. Meanwhile, the Myoda sect gathers for a meeting. Yaozo Shima declares that a traitor is among them. Juzo recounts the attempted theft of the right eye inside the Deep Keep, which casts suspi
Ryuji secretly tails Juzo to the Deep Keep, finding unconscious Exorcists along the way. Meanwhile, Rin finally manages to intentionally light two candles with his flames. Shura praises his progress but reminds him that his training has just begun. Rin reflects on Mephisto's wager with the Vatican. In the Keep, Juzo confronts Mamushi, who explains she has betrayed Myoda to expose its corruption, citing accusations from Todo that Mephisto concealed the left eye's location. She also mentions the V
Yaozo orders Juzo to secretly follow Tatsuma, who discreetly slips an envelope into Shura's pocket. At the Kyoto Branch, Yukio and his team arrive, and Yaozo convenes a meeting to discuss the danger of uniting the left and right eyes of the Impure King. Meanwhile, Mamushi escapes with Todo to a rooftop and appears exhausted from the right eye's miasma. Shura informs Yukio of Rin's earlier outburst and together they go to the confinement room to check up on him. Elsewhere, Shiemi confides in Kami
Todo and Mamushi flee to the abandoned Myoda stronghold. Tatsuma's letter to Rin continues: Shiro arrived at Myoda fifteen years ago to take the Kurikara sword but got injured from fighting the demon. While recovering, Shiro confided in his intent to use the sword to kill a child, which horrified Tatsuma. However, after Shiro healed Myoda members afflicted from miasma, including Tatsuma's wife and unborn son, Tatsuma decided to trust him and helps him escape with the sword. Months later during t
Yukio fears Rin will become a target if he fights, but Shura argues that Rin should decide for himself and returns Kurikara to him, but he hesitates unsheathing it. Mephisto arrives and arrests Rin, revealing the Vatican has sentenced him to death. Before leaving, Mephisto gives Shura a special set of clothes as Yukio begins organizing an attack on the Impure King. Meanwhile, Mamushi and Juzo return to the sect. Overcome with guilt, Mamushi urges the Myoda forces to fight and rescue Tatsuma. Yao
The Impure King's miasma begins spreading, infecting nearby civilians. Shura instructs the Exwires to locate Tatsuma as the Tamers summon Ucchusma, a flame demon effective against miasma, to use its energy to battle the Impure King. Meanwhile, the Rin and the Exwires discover Tatsuma in critical condition. Karura manifests before them, revealing it saved Tatsuma by healing his major injuries. Tatsuma explains that the Impure King will grow to the size of a castle, developing a central sporangium
Yukio confesses he both loves and hates his brother Rin, but admits he despises himself even more. Yukio traps Todo in a water prison using a naiad summoning. Elsewhere, Kuro carries Ryuji and Rin towards the Impure King. After landing on a rock not inflicted miasma, Ryuji successfully casts the barrier. Back on the battlefield, Yukio is nearly spent as Todo breaks free from his water prison. Meanwhile, Renzo and Miwa climb up a tree with only a torch holding off the miasma. Miwa accuses Renzo o
The Impure King reveals its true form to be a massive, maggot-like creature. As the demon targets Rin and Ryuji, Yaozo orders the troops to retreat outside the barrier. Meanwhile, Todo battles Juzo and his fellow Exorcists, absorbing all their flame attacks using Karura's immense power. Yukio proposes a reckless plan to Juzo that could cost them. While the Exorcist chant flame sutras, two of them flank Todo to no avail. As Todo taunts them, Juzo suddenly throws a massive ball of flame from above
Konekomaru and Renzo meet up with the Myōō Dharani to report about the battle. Yukio continues battling Todo and finally silences him after he claims deep down Yukio is a demon. Yukio and the Exorcists head back to the frontlines. Meanwhile, Shura reaches Rin and Ryuji just before Ryuji collapses, which breaks the barrier. The demon Ucchusma reappears, mocking the humans as weaklings but ultimately fusing with Rin's flames to help defeat the Impure King. In the forest, Shiemi exhausts herself sa
Reinforcements arrive by morning and Tatsuma is returned home safely. Juzo informs Mamushi of the Impure King's defeat. Rin awakens beside Kuro and Shiemi, thanking the latter for her support. Shiemi says they'll be friends forever, leaving Rin dismayed at being friend zoned. Later that night, Mephisto arranges for Yaozo to testify in Rin's defense at the Vatican. After Yaozo departs, Shura confronts Mephisto as she suspects he's scheming something. Mephisto brushes her concerns off with veiled