In response to a global rise in demonic possessions, the Catholic Church reopens exorcism schools to train priests in the Rite of Exorcism. On this spiritual battlefield, an unlikely warrior rises: a young nun, Sister Ann (Jacqueline Byers). Although nuns are forbidden to perform exorcisms, a professor (Colin Salmon) recognizes Sister Ann’s gifts and agrees to train her.
Thrust onto the spiritual frontline with fellow student Father Dante (Christian Navarro), Sister Ann finds herself in a battle for the soul of a young girl, whom Sister Ann believes is possessed by the same demon that tormented her own mother years ago. She must now try to save this young girl's life as the demon toys with Ann and tries to possess the rest of the school.