A Devil for K-Unit

On the hunt for a lost soul, Nico butts heads with the CIA. After completing an assignment to gain their trust, Nico finds himself thrust into life at Brecon Beacons, where he gets put into K-Unit. And he's not the only one underage there... Alex Rider seems to be back and Dr Three is out for him. With Nico's new resolve and determination, how long until something gets blown up?