Concluding the documentary about the disappearance of nine-year-old Shannon Matthews in 2008, an investigation that gripped the nation. Her mother Karen claimed that her daughter had gone missing on the way home from school, prompting a nationwide search. But weeks later, it was revealed that Karen had known the truth all along - in a hoax kidnapping, Shannon was being kept hidden by a man known to her mother, who had plotted to claim the £50,000 reward money for her return.