Teri McIntyre has enrolled her 15-year-old son at St Isaac's Catholicboarding school, hoping this venerable institution will have a calminginfluence on him. But Ryan arrives to find the school awash with rumoursof violent death, mysterious disappearances, and a growing incidence ofdisturbing behavior within its hallowed halls. Things begin to changeafter Father Sebastian joins the faculty, bent on an extraordinary missionto prove the power of exorcism.Willing or not, St. Isaac's most troubledstudents become pawns in Father Sebastian's one-man war against evil -- awar so surprisingly effective that Rome itself starts taking notice. Butas Ryan is drawn ever more deeply into Father Sebastian's ministrations,he witnesses with mounting dread the transformations of his fellow pupils,and his certainty grows that it is forces of darkness, not divinity, whichare at work here. For evil is not being cast out ...instead, somethingunholy is being summoned. Something whose hour has finally come to bringhell unto earth.