After barely surviving a brutal attack by a sadistic serial killer, crime boss Jang Dong-su is left humiliated. Determined to catch the killer known as K, he forms an uneasy alliance with Jung Tae-seok, a relentless and incorruptible detective who often disrupts his illegal business. However, while Jang Dong-su wants K dead, Jung Tae-suk is determined to bring him to justice. With a deal in place—whoever finds K first will decide his fate—the hunt begins, blurring the lines between crime and law.
Unfortunately the movie The Gangster, the Cop, the Devil is not yet available on HBO Max.
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Art | Shin Bo-ra | Props |
| Crew | Yoon Seong-min | Stunts |
| Visual Effects | Bae Sang-min | Matte Painter |
| Production | Sylvester Stallone | Producer |
| Sound | Han Cheol-hui | Production Sound Mixer |
| Art | Kim Min-hye | Art Direction |
| Production | Choi Ji-young | Line Producer |
| Camera | Cha Min-jung | Still Photographer |
| Visual Effects | Park Eui-dong | Visual Effects |
| Production | Kim Min-jun | Line Producer |
| Directing | Lee Won-tae | Director |
| Sound | Kim Chang-sub | Sound Supervisor |
| Editing | Han Young-gyu | Editor |
| Costume & Make-Up | Nam Ji-soo | Costume Design |
| Editing | Heo Sun-mi | Editor |
| Production | Seo Kang-ho | Producer |
| Art | Cho Hwa-sung | Production Design |
| Production | Jang Won-seok | Executive Producer |
| Sound | Cho Young-wuk | Original Music Composer |
| Camera | Park Se-seung | Director of Photography |
| Art | Jeong Yi-jin | Production Design |
| Costume & Make-Up | Kim Hyun-jung | Makeup & Hair |
| Production | Jung Cheol-ung | Executive Producer |
| Writing | Lee Won-tae | Screenplay |
| Art | Choi Hong-seob | Set Decoration |
| Editing | An Hyeon-geon | Assistant Editor |
| Lighting | Shin Seung-hoon | Lighting Director |
| Camera | Ha Jin-kyung | Camera Operator |
| Crew | Choi Bong-rock | Fight Choreographer |
| Crew | Kim Seon-wung | Stunts |
| Crew | Jang Han-seung | Stunts |
