A terrorist doesn't let strangers in her flat because they might be undercover police or intelligence agents but her children bring their mates home & they run all over the place. The terrorist doesn't know that one of these kids has bugged every room in her house made copies of all her computer files & stolen her address book. The kid works for CHERUB. CHERUB agents are aged between ten & seventeen. They live in the real world slipping under adult radar & getting information that sends criminals & terrorists to jail. For official purposes these children do not exist.