1808. Captain Will Fraser has just returned from the Front in the Peninsular War. He is disgraced and penniless, the victim of a conspiracy led by a jealous and influential officer. Fraser has been falsely accused of insubordination and cowardice and dismissed from his regiment.

Fraser and Duncan Armstrong, his wounded Sergeant, arrive in London to seek out Will’s brother, Jack, who works for King George’ Government. But Jack has disappeared. He vanished from his lodgings a week ago and no one has seen him since. Friends and colleagues are baffled by his disappearance as is the young woman, Clara, who claims to be his wife.

Then Will is viciously attacked, seemingly mistaken for his brother, and only just escapes with his life. When news of this reaches Jack’s colleagues in Government, Will is recruited to find his brother and he and Armstrong set out to follow a trail littered with half-truths and misinformation.

For their task is not quite what it seems.

Will closely resembles his brother and it becomes evident that he is being used as a decoy to flush out Jack’s enemies. These are enemies of the State, for Jack Fraser is a spy and his colleagues believe he has uncovered evidence which will lead to the identity of a French spymaster embedded in the British Government.

Will’s search leads him to France but in this murky word of espionage, nothing is straightforward.

The soldier turned spy must unmask a traitor before a murder is committed and more secrets are revealed to the enemy.