Kang-soo, die in de gevangenis zit vanwege een valse beschuldiging, krijgt een aanbod van aanklager Gwan-hee om als informant te werken voor strafvermindering. Dankzij Kang-soo's hulp boekt Gwan-hee aanzienlijke resultaten en maakt hij snel kans op promotie. Ondertussen is Sang-jae, een rechercheur, alles behalve blij met Gwan-hee, die veel van zijn onderzoeken heeft verknald. Met aanhoudende vastberadenheid besluit hij zich te verdiepen in de relatie tussen de informant en de aanklager.
Nee, helaas is 야당 nog niet beschikbaar op Netflix in Nederland.
| Directing | 황병국 | Director |
| Camera | 이모개 | Director of Photography |
| Lighting | 이성환 | Lighting Director |
| Art | 이목원 | Production Design |
| Costume & Make-Up | 곽정애 | Costume Design |
| Crew | 허명행 | Martial Arts Choreographer |
| Writing | 김효석 | Writer |
| Writing | 윤순용 | Adaptation |
| Writing | 황병국 | Adaptation |
| Editing | Kim Woo-hyun | Editor |
| Sound | 김홍집 | Original Music Composer |
| Sound | 이진희 | Original Music Composer |
| Art | 박재완 | Props |
| Costume & Make-Up | Kim Seo-hee | Makeup & Hair |
| Costume & Make-Up | 황효균 | Special Effects Makeup Artist |
| Costume & Make-Up | 곽태용 | Special Effects Makeup Artist |
| Sound | 이상준 | Production Sound Mixer |
| Sound | 박용기 | Sound Supervisor |
| Sound | 박진홍 | Sound Supervisor |
| Visual Effects | 정도안 | Special Effects Supervisor |
| Visual Effects | 정민우 | Special Effects Supervisor |
| Visual Effects | Han Moon-sung | Visual Effects |
| Crew | Yoon Seong-min | Martial Arts Choreographer |
| Directing | 김주용 | Assistant Director |
| Editing | 박진영 | Colorist |
| Production | 조창래 | Line Producer |
| Editing | 김하나 | Editor |
| Production | Hong Jeong-in | Executive Producer |
| Production | 김원국 | Producer |
| Production | Kang Ga-mi | Associate Producer |
| Production | 김디나 | Associate Producer |
