Cho-won is an autistic but happy young man who loves to draw zebras and run. His mother wants him to feel normal by accomplishing a feat that no one thought his son could achieve. With the help of a coach in exile, she trains him to become a marathon runner.
Is Marathon on Netflix? Yes! The movie Marathon is now on Netflix in the countries listed below.
| Directing | Chung Yoon-chul | Director |
| Writing | Chung Yoon-chul | Writer |
| Writing | Song Ye-jin | Writer |
| Writing | Yoon Jin-ho | Writer |
| Production | Seok Myung-Hong | Producer |
| Sound | Jung Jin-wook | Production Sound Mixer |
| Visual Effects | Kim Gwang-su | Special Effects Supervisor |
| Production | Shin Chang-hwan | Producer |
| Production | Jeong Tae-sung | Executive Producer |
| Art | Lee Geun-ah | Production Design |
| Costume & Make-Up | Ham Hyun-joo | Costume Design |
| Lighting | Lee Jae-hyuk | Lighting Director |
| Art | Yoon Ki-chan | Set Decoration |
| Editing | Nam In-joo | Editor |
| Editing | Hahm Sung-won | Editor |
