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.

Cast

Shin Hye-sun

Lee Jun-young

Park Jung-woo

Park Hyuk-kwon

Cha Chung-hwa

Lee Chan-hyeong

Bae Hyeon-jun

Cha Woo-min

Kim Sang-woo

Lee Tae-hee