When Zak Darke's parents die in an unexplained mass murder he's left alone in the world. That is until he's sought out by a mysterious man: ‘I work for a government agency,’ the man tells him. ‘You don’t need to know which one. Not yet. All you need to know is that we’ve had our eye on you. There’s a possibility you could help us in certain . . . operational situations.’
_x000D_ Zak becomes Agent 21. What happened to the 20 agents before him he'll never know. What he does know is that his life is about to change for ever . . .