Byung-gu, a once-famous former professional boxer, makes ends meet doing odd jobs at the gym. While eager to start boxing again, he gets diagnosed with "punch drunk syndrome," a condition caused by cerebral concussions. One day, a new member of the gym arrives and volunteers to help Byung-gu.
| Directing | Jung Hyuk-ki | Director |
| Writing | Jung Hyuk-ki | Writer |
| Writing | Cho Hyun-chul | Writer |
| Production | Kim Jae-hee | Producer |
| Production | Lee Jung-eun | Producer |
| Production | An Eun-mi | Executive Producer |
| Camera | Kang Min-woo | Director of Photography |
| Sound | Jang Young-gyu | Original Music Composer |
| Art | Choi Chi-youl | Art Direction |
| Editing | Kim Sung-hoon | Assistant Editor |
| Lighting | Lee Seung-ho | Lighting Director |
| Sound | Go Dong-hoon | Production Sound Mixer |
| Crew | Lee Sang-ha | Martial Arts Choreographer |
| Visual Effects | Yang Il-seok | VFX Supervisor |
| Editing | Jeong Hye-ri | Digital Intermediate |
| Visual Effects | Min Jun-ho | VFX Supervisor |
