Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.
Unfortunately the movie The Merciless is not yet available on HBO Max.
| Visual Effects | Hong Jang-pyo | Special Effects Supervisor |
| Visual Effects | Shin Dae-yong | VFX Supervisor |
| Crew | Jeong Bong-yeon | Stunts |
| Crew | Yang Hae-gil | Stunts |
| Art | Nam Il-yeon | Set Decoration |
| Art | Kim Yun-suk | Props |
| Art | Noh Seung-goog | Set Decoration |
| Writing | Park Song-i | Storyboard |
| Crew | Yun Min-gyu | Stunts |
| Visual Effects | Shon Byeong-su | VFX Artist |
| Production | Kwon Mi-kyung | Executive Producer |
| Sound | Ko Dong-hun | Production Sound Mixer |
| Camera | Kang Min-woo | Camera Operator |
| Crew | Kwon Ji-hoon | Stunts |
| Visual Effects | Ryu Jae-hwan | VFX Supervisor |
| Directing | Byun Sung-hyun | Director |
| Writing | Byun Sung-hyun | Writer |
| Camera | Jeon Young-wook | Still Photographer |
| Crew | Cha Sang-do | Stunts |
| Visual Effects | 이동훈 | VFX Supervisor |
| Sound | Lee Jin-hee | Music |
| Camera | Cho Hyoung-rae | Director of Photography |
| Editing | Kim Sang-bum | Editor |
| Editing | Kim Jae-beom | Editor |
| Sound | Kim Hong-jip | Music |
| Production | Yun Ji-won | Producer |
| Production | Yi Jin-hee | Producer |
| Art | Han Ah-rum | Production Design |
| Writing | Kim Min-su | Writer |
| Production | An Eun-mi | Executive Producer |
| Production | Park Ji-sung | Executive Producer |
| Production | Miky Lee | Executive Producer |
| Editing | Jung Won-jun | Editorial Production Assistant |
| Costume & Make-Up | Son Eun-ju | Makeup & Hair |
| Sound | Park Ju-kang | Sound Supervisor |
| Art | Song Suk-ki | Set Decoration |
| Costume & Make-Up | Cho Hee-ran | Costume Design |
| Sound | Park Yong-gi | Sound Supervisor |
| Art | Kim Bo-mook | Art Direction |
| Costume & Make-Up | Kwak Tae-yong | Special Effects Makeup Artist |
| Costume & Make-Up | Hwang Hyo-kyun | Special Effects Makeup Artist |
| Camera | Lee Hyung-bin | Camera Operator |
| Visual Effects | Lee Jeon-hyoung | Senior Visual Effects Supervisor |
| Production | Jeong Tae-sung | Executive Producer |
| Lighting | Park Cheong-woo | Lighting Director |
| Crew | Choi Bong-rock | Fight Choreographer |
| Editing | Park Jin-young | Digital Intermediate |
| Camera | Jung Hoon | Key Grip |
| Crew | Kim Seon-wung | Stunts |
