Documentary on conductor Herbert van Karajan, focusing on his early adoption of audio and video recording technology and his impetus to make use of it to preserve his musical legacy for future generations.

The stakes could not be higher as visionary director Robert Lepage, the world's greatest singers, and the Metropolitan Opera tackle Wagner's Ring cycle. An intimate look at the enormous theatrical and musical challenges of staging opera's most monumental work, the film chronicles the quest to fulfill Wagner's dream of a perfect Ring.