A terrorist doesn't let strangers into her apartment because they might be undercover police or intelligence agents, but her children can bring their friends home and 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, and stolen her address book. The child, James, was recruited from an secret agency and is just a 12-year-old boy from the wrong side of the tracks, sent to an foster-care home when his mother dies and his stepfather disowns him. James was chosen due to his potential, and he finds himself in a secret location - at the training center for all CHERUB agents. He faces extreme hardship while preparing for his first mission - to foil a suspected anthrax attack.