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.
Is Sister on Netflix? Unfortunately the movie Sister is not yet available on Netflix.
| Production | Choung Yi-jun | Producer |
| Production | Kim Kwang-su | Co-Producer |
| Production | Lee Kang-il | Co-Producer |
| Production | Yoon Hye-jin | Co-Producer |
| Camera | Byun Bong-sun | Director of Photography |
| Production | Han Eun-young | Executive Producer |
| Directing | Jin Sung-moon | Director |
| Costume & Make-Up | Kim Ha-kyoung | Costume Design |
| Art | Lee Sang-hun | Props |
| Writing | J Blakeson | Original Film Writer |
| Directing | Jang Min-kyung | Assistant Director |
| Lighting | Choi Jung-hyun | Lighting Director |
| Costume & Make-Up | Park Min-hui | Makeup & Hair |
| Crew | Noh Nam-seok | Martial Arts Choreographer |
| Editing | Han Mi-yeon | Editor |
| Sound | Chae Min-ju | Original Music Composer |
| Sound | Park Yong-ki | Sound Supervisor |
| Visual Effects | Kim Nam-sik | Visual Effects |
| Editing | Lee Hye-min | Digital Intermediate |
| Art | An Ji-hye | Production Design |
| Sound | Choi Dong-geun | Production Sound Mixer |
| Camera | Choi Won-ryeol | Grip |
| Writing | Jin Sung-moon | Screenplay |
| Production | Jo Heon-tae | Associate Producer |
