1953 - A group of doctors are killed by supernatural forces linked to a possessed woman named Clarita. The Catholic Church sends Fathers Salvador and Benedicto who are tasked to perform an exorcism. Meanwhile, a photojournalist investigates the truth about Clarita's possession and helps the two priests perform the exorcism. Their journey to help Clarita shakes their faith as they face demonic encounters.
The film centers on the love story of Joy (Bernardo) and Ethan (Richards), Filipino workers based in Hong Kong. Ethan, a bartender, is keen on romantically pursuing Joy, a domestic helper who is wholly dedicated to providing for her family.
A son returns to the family home for his twin sister's funeral and is soon haunted not just by her ghost but also the dark memories in the house that had long been locked away.