The year is 1939. Germany, led by Adolf Hitler, has invaded Poland. The world is about to enter into one of the biggest and most terrible wars in history. But against the might of the Nazi forces rise up courageous individuals such as Sophie Scholl, Violette Szabo, Raymond Aubrac and many more. These heroes risked their lives for the sakes of others, often with little or no recognition. Here are some of their incredible stories...