When super-tough cop Harry Keeble announced he was joining one of London's child protection teams, his colleagues were shocked. Known as the 'Cardigan Squad', its officers were seen as glorified social workers dealing with domestics and frightened children. The reality was very different. Within a few months Keeble had fought machete-wielding thugs, rescued kids who had pit bulls chained to their cots and confronted the horrors of ritual abuse - all in his unrelenting war against child cruelty. Harry rescued dozens of kids: kids in crack houses, kids living in unimaginable filth and kids who had burned down their houses. Then there were the hostage situations, the lynch mobs and the almost impossible job of interviewing paedophiles.