Global demonic activity has risen sharply because of the Illuminati"s involvement and corrupt operations. To counter this unnatural surge, the Vatican headquarters has moved up its yearly Exorcist Certification Exam and opened it to as many candidates as possible, hoping to expand the ranks of exorcists.
From Rome, one of the Vatican"s most formidable exorcists—Lewin "Lightning" Light—arrives at True Cross Academy to coach the pupils for the upcoming test. Lewin"s effortless and expert handling of exorcisms instantly captivates Ryuuji "Bon" Suguro, who had lost his drive to study; unexpectedly, Lewin takes him on as a protégé. As the crisis deepens, twin brothers Rin and Yukio Okumura are dispatched to find the missing exorcist Shura Kirigakure, who appears bound by a decades‑old pact with an ancient, immortal demon lurking in the perilous, snow‑blanketed peaks of Aomori Prefecture. The hunt will test their resolve against the mountain's harsh conditions.
