An exceptionally talented undercover policewoman, Grace Flint nearly dies in a botched sting operation. Months later, physically healed but psychologically scarred, she gets an unexpected clue to her attacker, and disappears on a mission of revenge - unaware that she is about to pull the first string that will unravel a vastly complex web of international treachery, extortion and murder. Pursuing her, using whatever clues he can find, is Harry Cohen, the former chief legal adviser to the British Security Service, drawn back in as an impartial outsider because everybody is worried about Flint's safety - or are they? Much to his surprise, he finds himself tugging on a string of his own - and finds it leading him high into governments on both sides of the Atlantic, and into a conspiracy with unexpected resonances not only for him, but for Flint. For there are many kinds of betrayal. And some of them are worse than others....
