“Girl With Long Hair” shows how universal the look of 1970s softcore pornography was. It is populated by hipsters wearing aviator glasses and cool mustaches running after hot chicks with feathered Farrah Fawcett hairstyles and plastic jewelry. There are shag carpets on the floor and oil paintings on velvet on the walls. The decor uses the brightest colors available, especially international orange, a then ubiquitous shade that is now only seen on emergency equipment such as life jackets. The set designer and costume designer also used a lot of school bus yellow, fire engine red, and other bright, high visibility primary colors.
On Saint Valentine's Day in 1900, the female students at a private Australian school are given permission by their stern headmistress to travel to an ancient volcanic outcropping for an afternoon picnic.
During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.