Forbidden Adventure had been entitled Angkor until renamed by Dwain Esper in a bid to appeal to a wider audience. It tells the story of a group of explorers who set off in search of the lost city of Angkor in Cambodia. With its inevitable melange of love-crazed gorillas and topless women, the film follows the typical jungle-epic formula. Forbidden Adventure was concocted by combining old footage of a Harvard expedition with added scenes of men dressed in gorilla suits cavorting with naked ladies.