The Nun 3 continues the terrifying saga of Valak, the demonic nun, as she returns to wreak havoc in The Conjuring Universe. The film begins in 1960s Romania, several years after the events of The Nun 2. Sister Irene (Taissa Farmiga), who once banished Valak, now lives in seclusion, haunted by the traumatic memories of her past battles with the demon. She believes Valak is gone for good, but sinister forces are already at work.

The film introduces a new setting—a convent in France that becomes the epicenter of a series of strange and horrifying occurrences. The nuns at the convent report seeing shadowy figures, hearing whispers in the night, and experiencing possessions. At the heart of the terror is a young novice who begins to show signs of an ancient evil taking control of her. When local priests are unable to expel the demon, the Church calls for Sister Irene, who reluctantly comes out of hiding to confront her greatest fear once more.

As Irene investigates, she discovers that Valak’s return is tied to a cursed artifact hidden deep within the convent’s crypt—a relic that dates back to the origins of Valak’s evil. The film introduces an ancient ritual known as “The Binding,” a ceremony designed to contain the demon’s power. However, the ritual was never completed, and now Valak is more powerful than ever, seeking to break free and spread chaos across the world.

Sister Irene teams up with Father Burke (Demián Bichir), who survived his own encounter with Valak, to perform the ritual and seal the demon for good. The film’s atmosphere is tense and eerie, filled with terrifying visuals of Valak lurking in the shadows, and mind-bending possession sequences that blur the line between reality and the supernatural.

In a heart-pounding final act, the ritual goes horribly wrong, leading to a terrifying battle between Sister Irene and Valak. The film’s shocking twist reveals that Valak has been manipulating events all along, setting the stage for even greater chaos in the Conjuring Universe.