Claude, een jongen uit Oklahoma, komt naar New York. Hij raakt bevriend met een groep hippies, geleid door Berger en wordt verliefd op Sheila, een meisje uit een rijke familie. Hun geluk is echter van korte duur: Claude moet vechten in Vietnam. Gebaseerd op de beroemde Broadwaymusical uit de jaren 60.
“HAIR is, amazingly, not a period piece but a freshly conceived and staged memory of the tribulations of the mid-sixties. It is also a terrific musical. The songs, of course, were good to begin with: The glory of "Hair" and "Let the Sun Shine In" and "Age of Aquarius" and the sly, silly warmth of "Black Boys/White Boys." But to the original music, the film version adds a story that works well with it, airy and open photography, and glorious choreography by Twyla Tharp.” – Roger Ebert
"There is much to recommend in this film, and sheer energy pours off the screen in every frame." - TV Guide Magazine
"Hair is entertaining - even fabulously entertaining - because it is so strange, so young, so innocent, so beneficent and adolescent, so lovable and so loving; it is entertaining because it is - all of it is - so impossible, so remote, so inconceivable in any place anywhere outside of a Hollywood musical." - Jay Scott, The Globe and Mail, 28 Mar 1979