I, like millions of other Iranians, had first-hand experience of the city-to-city missile attacks during the Iran-Iraq War. It was ... "scary". Now, first-time director Anvari has used that real fear as a context, added foreboding metaphysical, political, and religious elements from his native Iran, and created a milestone in horror film-making. Taking elements from The Shining, The Amityville Horror, and modern Japanese horror (The Grudge, Dark Water - all creepy apartments), the film is still unique on its own, because both in terms of story and scares, it hits every note right. And all without spilling a single drop of blood.
PS: Currently hitting 98% on the Tomatometer. Available on-demand from Amazon.
PPS: This is UK's entry for the 2017 Foreign-Language Oscar race.