A young museum curator Isabelle (Katie Goldfinch) is sent to look at an ancient artefact, discovered in the basement of a stately home in Shropshire. Welcomed into the sprawling manor house by a seemingly hospitable family; Karl (Larry Rew), his wife Evelyn (Babette Barat) and their beautiful daughter Scarlet (Florence Cady), but all is not what it seems, as a dark and terrifying secret hangs over them.

Set in the near future. As a consequence of an ecumenical movement (Vatican Council IV), the Catholic Church has joined other religions and has eliminated much of the original dogma of Catholicism. A group of Irish monks rebel against this situation and react back to the past: they begin to say Mass in Latin and act according to traditional Catholic dogma. So, Rome decides to send a representative to investigate what is happening

After the unexpected death of a close friend, Kristina returns to her hometown looking for answers only to unearth a string of dark secrets. She soon realizes her life is also in danger the closer she gets to the truth.