Documentary offering new analysis of the investigation into the prolific serial rapist John Worboys, who drugged, raped and sexually assaulted over 100 victims in the back of his black cab between 2000 and 2008. With access to some of his victims, and the police team that finally cracked the case once flaws in the original investigation emerged, this film's new analysis of the facts explains why it took years before Worboys's long and violent campaign of terror against women was finally brought to an end.