A by-the-book police officer is assigned to secretly investigate a team leader who believes that the rules shouldn't stop an investigation. As the officer investigates further, his own attitudes begin to mirror the team leader's.
Is The Policeman's Lineage on Netflix? Yes! The movie The Policeman's Lineage is now on Netflix in the countries listed below.
| Production | Kim Min-kyung | Producer |
| Art | Kim Nam-ho | Set Decoration |
| Costume & Make-Up | Kwak Tae-yong | Special Effects Makeup Artist |
| Crew | Ryu Seong-cheol | Stunts |
| Visual Effects | Yoon Dae-won | Special Effects Supervisor |
| Costume & Make-Up | Lee Hee-eun | Special Effects Makeup Artist |
| Crew | Kwon Gwi-deok | Stunts |
| Writing | Son Tae-woong | Adaptation |
| Art | Jin Hoon | Props |
| Sound | Lee Seung-yeop | Sound Supervisor |
| Writing | Bae Young-ik | Writer |
| Lighting | Kim Hyo-seong | Lighting Director |
| Costume & Make-Up | Lee Eun-ju | Makeup & Hair |
| Production | Lee Han-seung | Producer |
| Editing | Nam Na-young | Editor |
| Costume & Make-Up | Kim Kyeong-mi | Costume Design |
| Crew | Choi Bong-rock | Martial Arts Choreographer |
| Production | Jung Hyun-ju | Executive Producer |
| Sound | Park Jun-o | Foley Artist |
| Sound | Han Cheol-hui | Production Sound Mixer |
| Costume & Make-Up | Kim Ho-sik | Special Effects Makeup Artist |
| Directing | Lee Tai-sung | Assistant Director |
| Editing | 이정민 | Digital Intermediate |
| Visual Effects | Kim Gwang-wook | VFX Supervisor |
| Crew | Lee Sang-min | Stunts |
| Crew | Park Gab-jin | Stunts |
| Camera | Park Gwan-yeol | Key Grip |
| Directing | Lee Kyu-man | Director |
| Writing | Joh Sasaki | Novel |
| Art | Chae Kyoung-sun | Production Design |
| Sound | Jang Young-gyu | Original Music Composer |
| Camera | Kang Gook-hyun | Director of Photography |
