Sister Ann, a nun, is faced with her first exorcism, and soon realises the demon is familiar.
Due to a global rise in demonic possessions, The Catholic church makes the bold move to re-open schools to train priests in the art of performing an exorcism. A little bit of context is needed here, but by Catholic law, nun's aren't supposed to perform exorcisms. However, a professor senses Sister Ann's gift and agrees to train her. Little does she know, the Devil is watching her every move.