Seo-jin is een weduwnaar die nog steeds rouwt om de dood van zijn vrouw. Dan ontvangt hij het nieuws dat zijn lang verloren gewaande jongere zus, Yoo-jin, die 25 jaar geleden vermist werd, is opgedoken. In tegenstelling tot de rest van zijn familie, die haar in hun armen verwelkomt, voelt Seo-jin dat Yoo-jin een vreemde is.
Nee, helaas is 침입자 nog niet beschikbaar op Netflix in Nederland.
| Sound | Kim Gi-nam | Production Sound Mixer |
| Lighting | Cho Hyun-chul | Lighting Artist |
| Crew | Kim Yong-ho | Stunts |
| Camera | Hong Eue-su | Key Grip |
| Art | Jin Hoon | Props |
| Crew | Lim Wang-sub | Martial Arts Choreographer |
| Production | Jung Hyun-ju | Executive Producer |
| Art | Kim Jung-woo | Set Decoration |
| Visual Effects | Lee Dong-ho | Special Effects Supervisor |
| Visual Effects | Park Kyoung-soo | Special Effects Supervisor |
| Visual Effects | Yoon Jae-hun | VFX Supervisor |
| Directing | Sohn Won-pyung | Director |
| Writing | Sohn Won-pyung | Writer |
| Production | 장원석 | Executive Producer |
| Production | 박경원 | Producer |
| Camera | Baek Yoon-seuk | Director of Photography |
| Editing | 김창주 | Editor |
| Art | Lee Nae-kyung | Production Design |
| Sound | 공태원 | Sound Supervisor |
| Costume & Make-Up | Sung So-won | Makeup & Hair |
| Costume & Make-Up | Kim Byeong-hui | Costume Design |
| Writing | Jeong Cheol | Adaptation |
| Lighting | Lee Jun-il | Lighting Director |
| Production | Yoo Young-chae | Producer |
| Sound | Kim Tae-hoon | Original Music Composer |
