The Medium

The Medium is a 2021 Isan-language pseudo-documentary supernatural folk horror film co-written and produced by Na Hong-jin and directed by Banjong Pisanthanakun. It is a co-production of Thailand's GDH 559 and South Korea's Showbox. The film premiered at the 25th Bucheon International Fantastic Film Festival on 11 July 2021. It was theatrically released in South Korea on 14 July 2021. It was selected as the Thai entry for the Best International Feature Film at the 94th Academy Awards but was not nominated.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.