The story of the legendary radio personality Bob Fass, who revolutionized the FM airwaves in the 1960s and '70s with his free-form program Radio Unnameable, a cultural hub for music, politics, and audience engagement. From the beginning, major cultural figures have dropped by the studio to perform, take calls and engage in the program's spontaneity. The list of notables who've appeared is astounding: Bob Dylan, Abbie Hoffman, Allen Ginsberg, Joni Mitchell, Yoko Ono, Muddy Waters, Timothy Leary amongst many more. The film showcases these appearances alongside current sounds that Fass champions.