妹妹公主Set in the closing months of WWII, Fog of War tells the story of injured American pilot Gene and his OSS agent fiancée Penny as they retreat to a remote estate in Massachusetts to stay with Penny’s distant uncle Robert. Unbeknownst to her, the OSS has recruited Gene to spy on the family and the surrounding community as top-secret documents related to the D-Day invasion have been stolen and an enemy mole is somewhere nearby, preparing to turn these plans over to the Axis Powers.