What is the Nun about?

"The Nun" is a 2018 horror film in "The Conjuring" universe, directed by Corin Hardy. The movie follows a priest with a haunted past and a novitiate on the threshold of her final vows who are sent by the Vatican to investigate the suicide of a young nun in Romania. As they uncover the dark secrets of the abbey, they confront a malevolent force in the form of a demonic nun. The film explores themes of faith, evil, and the supernatural.