Set in Europe during World War II, a group of American soldiers are in the process of being shipped off to military prison for a variety of infractions, ranging from desertion to murder. While they're being transported, a German air attack hits the convoy, killing most of the MPs and enabling five of the prisoners to escape. The group decides their best bet is to head to neutral Switzerland, where they can avoid the fighting and prison. As they make their way to what they think will be freedom, they end up volunteering for a commando mission to steal the new prototype gyroscope for the Nazi V2 with help of the French Underground. Somehow the team must sneak onto the most heavily guarded train in German territory, steal the Nazis' most precious military hardware, and bring it back to the Allies without getting arrested again by their own side.