Ryu Sun-woo (Bae Hyun-sung) is the son of single mother Ryu So-young (Kim Hyun-joo). One day, Sun-woo goes on a camping trip with his schoolmates. However, the school bus carrying Sun-woo suddenly disappears. Several days later, the bus is found, but Sun-woo and his friends are nowhere to be seen. Nine years later, Sun-woo unexpectedly returns as a young adult, looking nothing like his mother had imagined. During the years of his disappearance, the grieving So-young has sought comfort in an artificial intelligence (AI) program that recreates an image of Sun-woo as a young boy. As a result, the reunion between mother and son becomes unsettling, leaving their relationship feeling strangely unfamiliar.

Director Yeon Sang-ho, known for Train to Busan (2016), adapted Paradise Lost from Oh Sung-eun's novel Black Inferno. The film premiered at the Toronto International Film Festival (TIFF) on 13 September 2026 and is scheduled for nationwide theatrical release in South Korea on 21 October 2026. The Indonesian Film Censorship Institution (LSF) has classified Paradise Lost for audiences aged 17 and above. Be discerning in selecting content suitable for your age. (irf)