Plot: Two Mormons (Chloe East and Sophie Thatcher) on a mission knock on the wrong door and find themselves fighting for their lives, faith, and sanity.

Review: Heretic is the latest horror flick from A24, and like many of their genre efforts, it’s a provocative one. Questions of theology and faith are always timely, and much of this diabolical and impressively harsh horror film deals with whether or not – in the face of great conflict – you can maintain your faith or be swayed by both the desire to save your own life and the evidence you’re being presented with.

In this, Sister Paxton (Chloe East) and Sister Barnes (Sophie Thatcher) are young Mormons fulfilling their duties as missionaries by essentially going door-to-door to try to convert people to their faith. Neither is a particular stickler for Mormon theology, with the movie opening with them discussing pornography and condoms,...