When the secrecy of a nuclear weapon agreement is thrown into doubt, a disgraced intelligence operative is recruited to find out if the deal is still safe… Ali Sinclair, wrongly convicted and on the run from a Mexican prison, is enlisted to infiltrate her old friend’s inner circle and find the evidence. The only people on her side are an ex-Cold War spook and the former Royal Marine that was sent to find her. Together they discover that the stakes are much higher than anyone knew, and the fate of the world is at risk… But when you live in the shadows who can you trust?

Freed from prison and back in Europe, Ali Sinclair has one job... find Frank McGill. The information he has is vital if they are to end the conspiracy that threatens to bring down the Government and push NATO to the brink of war. With terrorist attacks increasing and a mole at the top of the establishment, Sinclair and McGill will need to use all their skills to follow the clues across the continent in a deadly treasure hunt that drags them back towards London. But when you're being hunted by assassins and the authorities... going home isn't always the safest option.