Heretic 

Two young missionaries are forced to prove their faith when they knock on the wrong door and are greeted by a diabolical Mr. Reed (Hugh Grant), becoming ensnared in his deadly game of cat-and-mouse.

It’s a recipe for setting an audience on edge, and the more it simmers, the more Heretic proves itself a compelling, inventive thriller driven by three great central performances. – AV Club

Heretic intriguingly plays with our expectations of who the heroes and villains are in this scenario. – Slant Magazine