After a traumatic event, a drug trafficker turns sides and conspires with a dangerously ambitious undercover police officer to bring down the mysterious kingpin of a major drug cartel.
Is Believer on Netflix? Yes! The movie Believer is now on Netflix in the countries listed below.
| Directing | Lee Hae-young | Director |
| Writing | Chung Seo-kyung | Screenplay |
| Writing | Lee Hae-young | Screenplay |
| Camera | Kim Tae-kyeong | Director of Photography |
| Production | Han Seung-hee | Producer |
| Production | Yoon Suk-chan | Producer |
| Production | Jeong Hui-sun | Producer |
| Editing | Yang Jin-mo | Editor |
| Art | Lee Ha-jun | Production Design |
| Costume & Make-Up | Choi Se-yeon | Costume Design |
| Costume & Make-Up | Jang Yoon-jung | Makeup & Hair |
| Production | Syd Lim | Executive Producer |
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Production | Cha Hyun-woo | Executive Producer |
| Sound | Dalpalan | Original Music Composer |
| Sound | Hong Ye-yeong | Sound Designer |
| Production | Kim Woo-taek | Co-Executive Producer |
| Costume & Make-Up | Kang Dong-yul | Costume Design |
| Art | Oh You-jin | Props |
| Art | Jeon Jae-wook | Props |
| Art | Mo So-ra | Art Direction |
| Directing | Cho Yong-jin | Assistant Director |
| Sound | Kim Young-ho | Sound Mixer |
| Visual Effects | Jung Sung-jin | Visual Effects Supervisor |
| Production | Kim Dong-sik | Line Producer |
| Lighting | Hong Seung-chul | Lighting Director |
| Sound | Ahn Bok-nam | Production Sound Mixer |
| Visual Effects | Kang Jong-ik | VFX Supervisor |
| Crew | Heo Myeong-haeng | Martial Arts Choreographer |
| Visual Effects | Kim Jung-hun | VFX Supervisor |
| Production | Jay Lee | Associate Producer |
| Editing | Park Jin-young | Digital Intermediate |
| Art | Song Suk-ki | Set Decoration |
| Crew | Ryu Seong-cheol | Stunts |
| Crew | Jeong Jin-geun | Martial Arts Choreographer |
| Art | Im Se-jin | Art Direction |
| Writing | Lee Yoon-ho | Storyboard |
| Visual Effects | Chan-jin Chris Kim | Visual Effects Producer |
| Editing | Lim Hye-jin | Assistant Editor |
| Costume & Make-Up | Heo Jin | Costumer |
| Costume & Make-Up | Shin Soo-bin | Costumer |
| Camera | Jeon Young-wook | Still Photographer |
| Camera | Ji Sung-yong | Key Grip |
| Production | Ham Jin | Producer |
| Writing | Yau Nai-hoi | Original Film Writer |
| Writing | Wai Ka-fai | Original Film Writer |
| Production | Jang Eun-young | Line Producer |
