Lors de la chute de l'empire soviétique, Denis Obidin a fait main basse sur l'industrie aéronautique russe. Aujourd'hui confronté à des difficultés financières, il s'apprête à vendre son arsenal à des groupes terroristes. James est envoyé en Russie pour infiltrer le clan Obidin. Il ignore encore que cette mission va le conduire au bord de l'abîme...

When an MI5 operation goes disastrously wrong, James Adams needs all of his skills to get out of Russia alive. Meanwhile, his sister Lauren is on her first solo mission, trying to uncover a brutal human trafficking operation. And when James does get home, he finds that his nightmare is just beginning ... CHERUB agents have one crucial advantage: adults never suspect that children are spying on them. For official purposes, these children do not exist.