"Takes you deep into the artistic and musical challenges of the epic Ring des Nibelungen by Richard Wagner. Visionary director Robert Lepage begins a five-year journey to create the most ambitious staging in Metropolitan Opera history, featuring a 90,000 pound set ("The Machine") conceived to meet Wagner's immense theatrical demands. The film follows heroic singers from rehearsals to performance as they take on many of the most daunting roles in opera"--Container....