In the dark days of 1941, Britain fights on alone. Invasion threatens and fear hangs in the air. Some yearn for peace and an end to the relentless Nazi bombing. Others are spurred on to fight for victory, no matter the cost. And some will manipulate a divided country for their own ends. On a winter's night, a German spy parachutes into the Cambridgeshire fenland while another man is secretly murdered in the same field...