Two women play a deadly game of truth and lies on the road from Istanbul to Paris and London. One woman has a secret, the other a mission to reveal it before thousands of lives are lost. In the shadows, mission controllers at the CIA and French DGSE must put differences aside and work together to avert potential disaster.

The dramatised account of how the world’s greatest Special Forces unit, the SAS, was formed under extraordinary circumstances in the darkest days of World War Two.