"The Nun (2023)" centers around the mysterious Abbey of St. Carta in 1952 Romania. Ominous and isolated, this abbey holds a dark secret that threatens the balance between good and evil. A young novitiate, Sister Victoria, takes her own life under mysterious circumstances, prompting the Vatican to send Father Anthony, a priest with a haunted past, and Sister Irene, a novice on the edge of taking an oath, for fact-finding.