Ryan McIntyre's father's untimely death has sent the 15-year-old into a tailspin. Not knowing what else to do, his mother enrolls him in St. Isaac's Catholic boarding school, hoping the institution with a reputation for transforming wayward teens can help her son. But when Ryan arrives, the school is buzzing with news of a student's violent death, another's mysterious disappearance, and growing incidents of disturbing behavior within the hallowed halls.The tide begins to turn when Father Sebastian joins the faculty. Armed with the knowledge and skills acquired through years of secret study, the young priest has been dispatched on an extraordinary mission: to prove the power of exorcism. Willing or not, St. Isaac's most troubled students will be pawns in Father Sebastian's one-man war against evil -- a war so surprisingly effective that even the pope takes notice.But as Ryan witnesses the transformations of his fellow pupils, he's certain that darkness -- not divinity -- is at work. Something that hasn't stirred since the Inquisition's reign of terror is being called forth -- and it will bring hell on earth.