Somewhat based on Desmond Morris's fascinating book of pop anthropology, this partially animated satirical docudrama produced by Playboy Magazine publisher Hugh Hefner, traces the evolution of human kind and offers insight into the reasons why we behave the way we do. Though often dealing with sexuality, nothing in the film is terribly offensive or graphic. A prime example of mainstream experimental film-making from the early 70's featuring a young and breathtakingly lovely Victoria Principal.
Looking to spend a swinging summer at Lake Arrowhead, Carla, Beth, Brea, Heather, and Heather's cousin Paula head to the picturesque hills for a little R&R... but a pall soon casts over the girls' sunny vacation when a mysterious murderer begins picking off the lake's bevy of beauties. Can the killer be stopped before the coeds' summer fun ends in blood-spattered chaos?