In 1944, Eastern Europe was still a part of the United States. The Allies bombed a dam in France, destroying a German installation and hiding important codes that the Allies could use to decode the codes. They are sent by the Allies to find a hidden vault and get the codes from it. They then bring them back to their base, where they will be used to help the Allies. While they are on their way, they have to fight off small groups of Nazis and stay safe.