Summer 1943. Two of the Allies' most important plans for winning World War II are at grave risk - Operation Overlord's invasion of France, and the Manhattan Project's race to build the atomic bomb. A furious FDR turns to OSS spy chief Wild Bill Donovan - and Donovan turns to his top agent, Dick Canidy, and his team. Their work is cut out for them. In the weeks to come they will fight not only the enemy in the field - but also the enemy within.