'Train to Busan', 'Colony' director returns with South Korean horror film about two female influencers

Acclaimed filmmaker Yeon Sang-ho, best known for "Train to Busan" and "Colony", is back with "Devotion", an upcoming South Korean mystery-horror thriller that promises a chilling mix of psychological suspense, supernatural elements and occult mystery.

The film is co-directed by Yoon Young-woo, the former's frequent collaborator who has assisted him in numerous films.

Per the official logline, "Devotion" revolves around two popular influencer sisters, Su-a and Min-a, who are admired for their seemingly perfect lives and public image. However, their world takes a frightening turn during a camping trip when Min-a suddenly disappears without a trace. Desperate to find her sister, Su-a ventures deep into the forest, where she discovers the abandoned remains of a mysterious cult. As she follows the trail, she becomes trapped in a strange and terrifying world where the line between reality and illusion begins to disappear. The sisters must find a way to escape before they lose themselves completely.

The film features Moon Geun-young as Soo-ah, Go Ah-sung as Deok-hee and Kim Si-a as Min-ah. Song Hyun-suk is handling cinematography, while Hwang Pil-sung serves as producer.

"Devotion" completed its principal filming in August 2026 and is now in post-production. Screen Daily reports that Showbox officially launched the film's international sales at the Asian Contents & Film Market (ACFM) in Busan in October 2026, introducing it to potential global distributors.

The film is currently scheduled for release in 2027, although its exact release date has not yet been announced. Details about its international theatrical release and premiere are expected to become clearer as distribution agreements are finalised.