 His Greystoke estate had become financially depleted due his support of the Allies war efforts and he concluded it was time to return to Opar for another withdrawal.Tarzan encountered Hawkes' party, where he was drugged and ended up in the hands of the Oparians.Queen La, who had come into disfavor with the high priest, felt she had nothing to lose by escaping with Tarzan through the only unguarded route—a path to the legendary valley of diamonds, from which no one had ever returned.