Commemorating the centennial of Mercer's birth, this documentary is part biography, part archive, and part recontextualization, taking Mercer's tunes and putting them in the hands of modern singers like Jamie Cullum and Dr. John to show they are still relevant today. Host Clint Eastwood also interviews artists who collaborated with Mercer or performed his songs, including composer John Williams, Blake Edwards, Andre Previn, Tony Bennett, and Julie Andrews.