Jeff Feuerzeig's acclaimed documentary portrait of Daniel Johnston — musician, artist, and one of America's great outsider creative spirits — chronicles his life from childhood home movies through his battles with mental illness, his rise to cult fame championed by Kurt Cobain, and his extraordinary output of homemade cassette tapes and naive-art drawings. Moving, funny, and devastating by turns, the film is an essential document of an artist who created from pure, unmediated emotion, and whose influence extended far beyond his modest commercial footprint.