This film follows Sister Junia,
a devout nun, and Sister Michaela,
a more pragmatic one, as they face a possessed young boy, Hee-joon.
Junia, moved by compassion, seeks to save him, while Michaela, initially doubtful, joins the investigation.
Their search for answers leads them to terrifying encounters and a hidden dark secret within their convent.
They are forced to confront their own doubts and fears as they fight a powerful evil that endangers Hee-joon and their religious order.
