Sister (2026): cast, story & where to watch
2026 · Film · ★ 5.8
Released in 2026, Sister is a crime and thriller film directed by Jin Sung-moon, running about 87 minutes.
What it’s about. Desperate to raise money for her younger sister's surgery, Hae-ran teams up with Tae-soo to kidnap her half-sister So-jin. So-jin wakes up confined in an unfamiliar place. Hae-ran and Tae-soo demand a hefty ransom, expecting her wealthy father to cough up the money. Upon discovering that one of her captors is her half-sister, So-jin enters a precarious alliance that blurs the lines between victim and perpetrator as she plots a counterattack against the ruthless Tae-soo.
Who’s in it. Sister stars Jung Zi-so as Seong Hae-ran, Lee Soo-hyuk as Jung Tae-soo, Cha Joo-young as Park So-jin and Jung Ji-woo as Radio DJ.
How it landed. With an audience score of 5.8/10, Sister has drawn a solid, mixed-to-positive response.
Where to watch. Streaming options change often. See the full, country-by-country breakdown on our where to watch Sister page.
If you liked it. Fans of Sister tend to enjoy The Shawshank Redemption, The Godfather, The Godfather Part II and The Dark Knight.
Frequently asked
- Where can I watch Sister (2026)?
- Streaming, rental and purchase options for Sister change frequently. Check our where-to-watch page for the latest availability in your country.
- Is Sister worth watching?
- Sister holds an audience score of 5.8 out of 10, and is a strong pick if you enjoy crime and thriller. Reactions are mixed, so it may depend on taste.
- Who stars in Sister?
- Sister stars Jung Zi-so, Lee Soo-hyuk, Cha Joo-young and Jung Ji-woo.
- When was Sister released?
- Sister was released in 2026, with a runtime of about 87 minutes.