Jennie (Susan Strasberg) travels to San Francisco to locate her hippie brother Steve (Bruce Dern). She meets Stoney (Jack Nicholson) in a coffeehouse and he helps her look for Steve, who Stoney has seen in his various attempts to start a rock & roll band. Stoney and his pals transform the square girl into a swinging hippie chick, complete with a mod miniskirt. Along with their buddy Dave (Dean Stockwell), they search for Steve amidst the psychedelic splendor of the Haight-Ashbury hippie haunts. Dave is killed by a car when he wanders around in an STP-induced stupor. LSD, marijuana, and the good and the bad sides of hippie life are illustrated with non-judgmental accuracy. The soundtrack of the movie is a musical gem, complete with the international smash Incense and Peppermints by the Strawberry Alarm Clock. This time-capsulized gem was produced by Dick Clark, the world's oldest teenager.