Cecilia, a woman of devout faith, is warmly welcomed to the picture-perfect Italian countryside where she is offered a new role at an illustrious convent. But it becomes clear to Cecilia that her new home harbors dark and horrifying secrets.

A 17th-century nun in Italy suffers from disturbing religious and erotic visions. She is assisted by a companion, and the relationship between the two women develops into a romantic love affair.