Alan Craik and his wife Rose are flying high. She’s heading for astronaut training; he’s off to espionage school. But they come crashing down to earth when Rose is falsely accused of spying. As Alan risks everything to clear her name, a series of stunning escalations take his high-tech airborne attachment – and the world – to the brink of war. Suddenly, Craik finds himself hurtling through forbidden airspace to find “Top Hook”, the spy whose act of betrayal is more complex – and chilling – than anyone can imagine.