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.

Sister (2026)

I've kidnapped my sister today.

★ 5.8/10 January 28, 2026 87 min

CrimeThriller

Director: Jin Sung-moon  ·  Writer: Jin Sung-moon

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.

Director

Jin Sung-moon

Cast

Jung Zi-so Seong Hae-ran Lee Soo-hyuk Jung Tae-soo Cha Joo-young Park So-jin Jung Ji-woo Radio DJ