With just one punch, a foreign merchant named Ronny (Mahbub Alam) knocks out In-Ho (Yu Jun-Sang) during one of his Taekwondo training classes. In-Ho then goes to find Ronny to recover his dignity. However, what comes next is separation from his wife and being imprisoned..
| Directing | Shim Sang-Kuk | Director |
| Production | Kang Chul-kyu | Producer |
| Production | Kim Yeong-don | Co-Executive Producer |
| Crew | Jeon Yu-jun | Fight Choreographer |
| Writing | Shim Sang-Kuk | Writer |