Following the death of his mother, eleven-year-old James Choke gets separated from his half-sister, Lauren, and sent to a children's home. James may be a bit of a troublemaker, but he's also brilliant and soon makes an impression on his roommate--who introduces James to CHERUB.

CHERUB is an organization of highly trained, extremely talented spies aged ten to seventeen who tackle sensitive missions where adult agents would draw too much attention. When James passes the entrance exams, his next hurdle is the brutal one hundred days of basic training. From being forced to spend Christmas night outside in his underwear to a grueling three-day solo hike through a rain forest, James gets pushed to his limit and beyond...but he perseveres.

James is soon sent overseas with one of his CHERUB mentors to monitor a dangerous group of people, but when deadly compounds enter the mix, will James's first mission also be his last?