Wailing (2016)

AKA: Gok-seong; The Strangers
Directed by: Hong-jin Na
Starring: Do-won Kwak (Jong-goo), Hwan-hee Kim (Hyo-jin), Jun Kunimura (Japanese Man), Jung-min Hwang (Shaman), So-yeon Jang (Wife), Woo-hee Chun (Woman in white), Jin Heo (Mother-in-law)
Country: South Korea, Asian Cinema
Language: Korean (English Subtitles)
Runtime: 02:36:04
Genres: Horror, Family, Gruesome, Satanism, Detective-Mystery, Scars

Plot – Spoilers:
Jong-goo is a police sergeant who lives with his daughter, wife and mother-in-law in a small South Korean village. A dedicated family man, Jong-goo receives a call one morning about a double-murder. On reaching the murder site, the police find the killer in a trance and covered with strange sores. The murders were brutal and there is evidence of dark rituals and worship involved.

Over the next few days, more strange sightings and horrific murders occur, and the previously-detached Jong-goo is drawn deeper into the investigation when his daughter starts behaving strangely.

The Wailing is a horror movie that prefers to keep its plot vague but provides enough biblical references for those familiar with the book to draw their own conclusions.