Ae-ran, a mother who is proud with her son hears a shocking news that her son, Dohoon, who left the military has developed schizophrenia. Afraid of losing her perfect daily life, Ae-ran decided to hide his son's illness. But her secret life that seemed to be smooth started to change when Kyeong-hwa, the only person who knows her secret appeared, gradually turning her anxiety into madness.
Unfortunately the movie F20 is not yet available on HBO Max.
| Directing | Hong Eun-mi | Director |
| Writing | Chae Woo | Writer |
| Production | Lee Jeong-mi | Executive Producer |
| Production | Moon Bo-hyun | Producer |
