With the country on the brink of Civil War, the struggle for freedom is more dangerous than ever. Underground follows the story of American heroes and their moving journey to freedom.With the country on the brink of Civil War, the struggle for freedom is more dangerous than ever. Underground follows the story of American heroes and their moving journey to freedom.With the country on the brink of Civil War, the struggle for freedom is more dangerous than ever. Underground follows the story of American heroes and their moving journey to freedom.