弟弟被霸凌致死，哥哥蛰伏三年找到凶手，开启暴力复仇的动作片

High school student Seong-jin commits suicide after being the victim of school violence for a long time. Three years later, one of his bullies Han Yeo-wool debuts as a celebrity. Seong-jin’s brother, Seong-hyeon blames himself for not recognizing the pain his brother went though and finds a comment on Han Yeo-wool’s news report that Seong-jin didn’t commit suicide but was instead killed by Yeo-wool.