On the Heights (2026): Cast, Story and Release Details

Prepared by Movies Dock Editorial

On the Heights is a South Korean drama about a mother and daughter struggling to live with a family suicide and the silence it leaves behind. When the daughter returns after years away, their uneasy coexistence brings buried pain into view, while an unforeseen incident unsettles their fragile routine.

On the Heights is a 2026 South Korean drama centered on Hae-sook and Yoon-seul, a mother and daughter separated by grief as much as by distance. After a suicide in the family, both retreat into private forms of silence rather than confronting the loss together.

Yoon-seul’s return home places their estrangement in the same physical space. Written and directed by Kim Hyun-min, the film has a runtime of 1 hour and 41 minutes and is presented in Korean.

On the Heights movie details

Story without spoilers

The story follows Hae-sook and Yoon-seul after a suicide tears through their family. Although they remain connected by the loss, they respond to it in sharply different ways. Hae-sook tries to endure her grief through restless and self-destructive impulses, while Yoon-seul protects herself through emotional withdrawal.

When Yoon-seul comes back after a long absence, the unresolved tension between them becomes harder to avoid. Their shared daily life gradually brings reminders of the past to the surface, exposing the fragile bond that remains beneath their silence. An unexpected incident then interrupts the stillness surrounding them without revealing how the story ultimately develops.

What to expect

This is a character-focused drama built around bereavement, family estrangement and the difficulty of expressing pain. The premise points to an emotionally restrained story in which everyday interactions and the return of a separated family member carry much of the tension. Its central relationship is shaped by silence, contrasting coping mechanisms and a loss that neither woman can fully name.

Cast and creative team

Kim Sung-ryung plays Hae-sook, while Kim Se-won plays Yoon-seul. The cast also includes Lim Sun-woo, Kim Mi-hwa, Lee Seung-min, Yoon Ah-jung and Son Seong-chan. Kim Hyun-min is the director. No writer is listed in the supplied credits.

• Kim Sung-ryung as Hae-sook
• Kim Se-won as Yoon-seul
• Lim Sun-woo
• Kim Mi-hwa
• Lee Seung-min
• Yoon Ah-jung
• Son Seong-chan

Release and production context

On the Heights is listed as a 2026 release from South Korea. Its supplied release date is November 1, 2026, and its runtime is 1 hour and 41 minutes. The film is in Korean and is produced by Seesun Pictures. It is classified as a drama and is listed with a released status.

Production companies: Seesun Pictures

On the Heights official trailer

Watch the official trailer on YouTube

Movies Dock view

With its focus on a grieving mother and daughter, On the Heights approaches family loss through separation, silence and the uneasy process of living together again. The film’s compact runtime and single-genre classification place the emphasis on this intimate relationship and the disruption that challenges its fragile balance.

Film data:
TMDB · IMDb