"Helsinki, 1947. Finland teeters between the Soviet Union and the West. Everyone is being watched. A wrong look or a wrong word could end in catastrophe. Natalya Bobrova, from Russia, and Louise Koski, from the United States, are young wives of their country's military attachés. When they meet at an embassy party, their husbands, Arnie and Mikhail, both world-class skiers, drunkenly challenge each other to a friendly-but secret-cross-country wilderness...