In 1905, a man travels to a remote island in search of his missing sister who has been kidnapped by a mysterious religious cult.
This movie is anti-Christian. Look at the inverted cross in the name itself. It has an agenda - it's not just a movie. Do not watch it, do not let your close ones watch it either. There are many more other good horror flicks out there who can do it without demonising religion (and not any or all religion, it specifically targets Christians).