This is the story of a 7-year-old boy, Sang-woo, born and raised in the big city, and his mute grandmother, who has spent her whole life in a small rural village.
Jeong-yoon and Jong-bae own a car body repair shop together that gets in financial trouble. To help cover the losses and take care of her family, Jeong-yoon decides to smuggle thirty kilograms of cocaine.
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.
