Built out of “a pile of radio junk,” Bethesda, Maryland’s WHFS was a music fan’s dream of a radio station: the place on the dial to hear music listeners loved and new tunes they soon would, all with an anything-goes mentality and an ear for the sounds of social change. This doc pays loving tribute to free-form radio and WHFS’s influence over FM stations across the US from the 1960s to the 1980s. All good things come to an end, and so did the disc-jockey-driven format that WHFS pioneered and made successful, but its legacy lives on. The station’s DJs relate its history with passion in this film that captures the tenor of an era, abetted by reminiscences of performers including Emmylou Harris, Taj Mahal, Jesse Colin Young, and others whose music found its way to ears and minds eager for something more than the same old Top 40 programming.