When Rin Okumura learns his real father is the Demon Lord Satan, he swears to defeat him and enters True Cross Academy to become an exorcist.

While Izumo confronts Nemu Takara and the details of her past are revealed, war breaks out between the Knights of the True Cross and the Illuminati.

The Knights of the True Cross worry about the surge of demonic activity around the world. The lives of Rin and his exwire friends will be seriously impacted by a meeting at the Vatican.

"Shocked by the death of his foster father and the revelation that his real father is the demon lord Satan, Rin Okumura enters the True Cross Academy to learn to be an exorcist. But every great exorcist has to start somewhere, and for the students of the Academy the first step is the Esquire examination. To prepare for the exam, the new pages in Yukio's class must undergo intensive training. Rin and his classmates have their hands full when a demon...

The holiday season arrives at True Cross Academy, and Rin and his friends kick things off with a combined birthday and Christmas party. More happy news comes as they are invited to Kyoto for the New Year's wedding of Shima's older brother. But underneath the festivities runs a feeling of great uneasiness--tension grows between Yukio and Rin as they question the circumstances of their birth and who their mother really was. Elsewhere, Lightning continues...

"As his vision of the past draws to a close, an older Rin bears witness to the tragic climax of the Blue Night. He watches as Satan's cloned body can no longer contain the massive cosmic energies within him. The Knights of the True Cross are faced with an unprecedented crisis as a wave of destruction begins to sweep across the world."--Provided by publisher.

Raised by Father Fujimoto, a famous exorcist, Rin Okumura never knew his real father. One day a fateful argument with Father Fujimoto forces Rin to face a terrible truth - the blood of the demon lord Satan runs in Rin's veins! Rin swears to defeat Satan, but doing that means entering the mysterious True Cross Academy and becoming an exorcist himself. Shura Kirigakure has always been one of Rin and Yukio's most trusted friends and mentors, but her...

"An attack on Tokyo by a huge demon that is visible to almost everyone marks the start of an unprecedented outbreak of demonic activity around the world. While the Knights of the True Cross and the Japanese government scramble to contain the damage, Lightning's investigation into the Illuminati has pushed the Knights of the True Cross--and Yukio--just a little too far. Now Yukio rushes to confront Mephisto, determined to hear the truth of the circumstances...

"Surrounded by the fiery wreckage of the Illuminati airship, Rin struggles to control his demonic alter ego before it consumes both himself and Yukio. The brothers are torn by a mutual misunderstanding of each other that can only be reconciled with an all-out fight that has been a long time coming. Later, all the Exwires except Shiemi are reunited and try to come to terms with what has happened. But the battle with Satan is far from over. Elsewhere,...

Rin's journey through the past comes to a shocking end as he bears witness to the fateful Blue Night when his mother, Yuri Egin, gave birth to both Rin and Yukio. Rin never wanted to see, or even know about, his birth, but now he has learned something about himself that he may need in the coming conflict. Meanwhile, aboard the airship Dominus Liminus, the Illuminati and Lucifer move forward with their plans to bring forth Satan and return the world...