Keith Moore is Europe's biggest cocaine dealer. The police have been trying to get enough evidence to nail him for more than twenty years.

Now, four CHERUB agents are joining the hunt. Can a group of kids successfully infiltrate Keith Moore's organisation, when dozens of attempts by undercover police officers have failed?

James Adams has to start at the bottom, making deliveries for small-time drug dealers and getting to know the dangerous underworld they inhabit. He needs to make a big splash if he's going to win the confidence of the man at the top.