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 past is a mystery. When Shura suddenly goes missing, Mephisto sends Rin and Yukio to the cold and wintry north to find her. The journey is a chance for the brothers to talk over recent events, and try to sort out where things stand between them. Out in the frozen countryside, Shura reaches her destination, and a meeting with an entity who will impose an ancient curse upon her...