Im Dajun, who was abandoned at home, finds himself living as the leader of a runaway family. One day, he brings Yeonwoo home, who then goes on a stabbing spree in Incheon. Blocking Yeonwoo's path—who attempted to kill a chaebol chairman for revenge—is Yoon Gamin, the strongest boy aspiring to be the top student. Meanwhile, Na Hwajin from the Teachers' Rights Protection Agency observes the events with keen interest...