One of the victim family named Song C An has been suffered since the day her son was killed. Her personality has changed tremendously since after. She was workaholic, means, building walls from people. Workmate was scared of her and lots of people quit in her department. Her husband already sleep in office to avoid argue with her. One day, she terminated her daughter cell phone as she think she spend too much time on it. Cuz of such, she and her daughter has a big fight and her daughter suddenly yelled at her "why don't you die together with brother that day?" The daughter was then moved to her aunt to live a while. In the day of gun shot incidence, Song and her son go to cinema together. In the mid of the movie, she sneak out to answer work call and grab a coffee. By that time, the tragedy happened. For years, she accused herself not being a good mum and unable to protect her son. She cannot accept her careless and mistake made. After some time, she agreed to go with her husband to ...