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.

Yeon-du asks her best friend Bora to collect all the information she can about Baek Hyun-jin while she is away in the U.S. for heart surgery. Bora decides to get…

Yeon-du asks her best friend Bora to collect all the information she can about Baek Hyun-jin while she is away in the U.S. for heart surgery. Bora decides to get…