A series of contiguous sketches detail one young man's trip "... over fool's hill." Beginning with his first sexual encounter the story progresses through his early adolescence in the war years of World War Two, where he and his friends indulge in a riotous rebellion against authority and the morality of the time. His High School years start his "Trip" in earnest as he and his associates find the joys of booze, cigarettes, and sex and the thrill of bawdy parties. Our young hero's adolescence continues into his twenties when he encounters the freedom of Southern California, all of its temptations, its new experiences, and its milieu of sex, partying and sophomoronic fun.