 It and its sequels purport to fill in some of the ancient prehistory of the lost city of Opar, created by Edgar Rice Burroughs as a setting for his Tarzan series.In the plot of the novel, Hadon journeys to Khokarsa to compete in the "Great Games", in which he triumphs.The prize being that he is entitled to marry the ruling high priestess, should she choose to accept him, and thus become high priest and king of the Khokarsa.