From Radio 4's James Naughtie, a sophisticated thriller about loyalty, survival and family rivalry deep in the Cold War, drawing on decades of experience as a political insider in Westminster and Washington.

It is a sweltering July in the mid-1970s, and for Will Flemyng, foreign office minister, the temperature is rising with each passing hour. A mysterious death has exposed secret passions in government, bringing on a political crisis that will draw him back into a familiar world of danger and deceit.

For Flemyng has a past. He was trained as a spy for a life behind enemy lines and now he's compelled to go back. In the course of one long weekend he must question all his loyalties: to his friends, his enemies, and to his own two brothers.

Only then can he expose the truth in London and Washington. When he has walked through the fire.