As the Children's Commissioner releases the results of the most comprehensive study of child sexual abuse ever conducted in the UK, Professor Tanya Byron and Tazeen Ahmad investigate its shocking findings. How much do we really understand about this horrific crime? How common is child sex abuse and how much remains hidden? Who are the offenders and how many paedophiles are there in a typical town? They uncover the devastating reality behind the statistics, meeting the young victims, and the offenders themselves, to lay bare the truth about child sex abuse.
—BBC Two