An elusive hater, hiding behind a mask of anonymity, is playing a destructive game. Their provocations gradually draw a wide variety of people into the conflict—from public figures to ordinary users. Online bullying extends beyond the virtual realm and begins to affect real lives, destroying relationships, careers and trust between people. Whilst those around them try to figure out who is behind this barrage of aggression, it becomes clear that exposing this person could have unexpected consequences for everyone.