Paris, April 1968.
The cafes are alive with talk of revolution, but for Will Flemyng - secret servant at the British embassy - the crisis is personal. A few words from a stranger on the metro change his life. His family is threatened with ruin and he now faces the spy's oldest fear: exposure.

Freddy Craven is the hero and mentor Flemyng would trust with his life, but when he is tempted into a dark, Cold War labyrinth, he chooses the dangerous path and plays his game alone.

Then a bizarre murder reveals a web of secrets, and his loyalty to family and friends is tested as never before.

As the streets of Paris become a smoke-filled battleground, Flemyng, like his friends and enemies, discovers that where secrets are at stake, lives are too.