For twenty dangerous years he has worked undercover for Britain's Security Service. Then M15 asks one favour too many, an act of personal betrayal. When he refuses, he sees his world collapse and finds himself accused of a high-profile murder he did not commit. Yet the evidence against him is overwhelming. Only his former comrade-in-arms believes his innocence. The SAS tracker finds himself on the trail of the most deadly adversary of all. A rogue element within the secret state. With a crusading defence lawyer, who is renowned for her fiery temperament as her good looks, he takes on the police, government and legal system in a harrowing attempt to prove his friend's innocence. Yet before justice can run its course, they will unearth dark secrets and a prophecy that is moving inexorably towards its devastating fulfilment.