Sum, son of a policeman, is bullied at school and finds no comfort or care at home. As the demonstrations and violence in Hong Kong escalate, he suffers more violent and humiliating bullying. Wing, Sum's father, also faces enormous pressure under investigation of police brutality. The rift between father and son widens as the latter is increasingly abused and isolated at school. Things get out of control when the angry Sum unexpectedly finds a gun amidst the upheaval.