An expelled boxing champion, who now is a high-school teacher, witnesses intolerable violence and throws her first punch to build justice against it, while putting on a mask.
as So Si-min
as Han Su-gang
as Ko Jin-hyoung
as Lee Gwon-joong
as So Young-taek
as Lee Jae-gyeong
as Jin-hyoung's Grandmother
as Byeong-jin
as Lee Moon-gi
as Park Jung-ho
as Kim Jeong-gyu
as Byun Jae-hyeok
as Song Eun-gyo
as Min-ji
as Head Teacher
as Seo Sang-woo
as English Teacher
as Math Teacher
as Principal
as Hye-gyeong
as Chauffeur
as Costume manager
