A seven-year-old girl puts a nail-gun to her grandmother's neck and fires. An isolated incident, say the experts. The experts are wrong. Across the world, children are killing their families. Anthropologist Hesketh Lock has his own problems; but as more acts of child violence sweep the globe, he is forced to acknowledge possibilities that defy the rational principles on which he has staked his life, his career and, most devastatingly of all, his role as a father. Download and start listening now!