Searching for Sugarman (2012)

a documentary film directed by Malik Bendjelloul, which details the efforts of two Cape Town fans in the late 1990s, Stephen 'Sugar' Segerman and Craig Bartholomew Strydom, to find out whether the rumoured death of American musician Sixto Rodriguez was true, and, if not, to discover what had become of him. Rodriguez's music, which never took off in the United States, had become wildly popular in South Africa, but little was known about him there.

Excellent. Engrossing story, excellent music.