Paradise Lost (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

Paradise Lost is a South Korean thriller drama with science-fiction elements from director Yeon Sang-ho. The story follows a grieving mother whose son returns years after a bus carrying children mysteriously disappears, but the boy’s altered identity raises unsettling questions about technology, memory and loss.

Paradise Lost is a 2026 South Korean thriller drama with science-fiction elements, written and directed by Yeon Sang-ho. Its central mystery begins with the unexplained disappearance of a bus full of children and grows more complicated when one child seemingly returns years later.

The film focuses on Ryu So-young, a grieving mother forced to confront a version of her son that has been technologically altered. With its premise rooted in both personal loss and speculative technology, Paradise Lost sets up a story about a family trying to understand what has come back to them.

Paradise Lost movie details

Story without spoilers

A bus carrying children vanishes under mysterious circumstances, leaving the families behind to deal with uncertainty and grief. Years later, Ryu So-young encounters an altered version of her son, Ryu Sun-woo, whose return challenges her understanding of what happened and who he is.

The story follows her struggle to make sense of a technologically revised reality. Rather than offering a straightforward reunion, the film places identity, memory and bereavement at the center of its thriller-driven premise without revealing how the mystery develops.

What to expect

Paradise Lost combines thriller, drama and science-fiction elements. The premise points to a mystery built around a missing group of children, a delayed return and technology capable of changing reality. The emotional core comes from a mother dealing with grief while questioning the nature of the person who has returned.

The film is also based on a novel or book, according to its listed keywords. Viewers can expect a story shaped by suspense and speculative ideas, with family loss providing the personal stakes.

Cast and creative team

Kim Hyun-joo plays Ryu So-young, while Bae Hyeon-seong portrays Ryu Sun-woo. Yu Ji-wan appears as Young Ryu Sun-woo, and Lee Yoo-joo plays Yeon-doo. The cast also includes Kim Jong-tae, Lee Hyun-kyun and Koo Kyo-hwan.

Yeon Sang-ho directs Paradise Lost and shares writing credit with Ryu Yong-jae. The film is produced by Wow Point.

• Kim Hyun-joo as Ryu So-young
• Bae Hyeon-seong as Ryu Sun-woo
• Kim Jong-tae
• Lee Hyun-kyun
• Koo Kyo-hwan
• Lee Yoo-joo as Yeon-doo
• Yu Ji-wan as Young Ryu Sun-woo

Release and production context

Paradise Lost is a South Korean production in the Korean language. It is listed as a 2026 release, with a release date of October 21, 2026, and a runtime of 1 hour 41 minutes. The listed production company is Wow Point, and the film’s status is Released.

Production companies: Wow Point

Paradise Lost official trailer

Watch the official trailer on YouTube

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With its combination of disappearance mystery, family drama and speculative technology, Paradise Lost presents a focused premise built around the question of what it means for someone to return changed. The film’s listed genre blend and central relationship give it a clear foundation for a tense, emotionally driven science-fiction thriller.

Film data:
TMDB · IMDb