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After the sudden tragic loss of his daughter following an exorcism, a renowned heart surgeon refuses to face the reality that his child has died, despite declarations from medical examiners and even the priest who performed the expulsion. But as the funeral rites begin, mourners start witnessing unnerving changes to the girl’s body, leaving the priest to wonder whether something much more sinister—an evil more ancient than Catholicism itself—may once again be looming over them all.