The fifth exciting adventure in the stories of Tarzan. In the forgotten city of Opar, stood the altars where the ancient city offered blood sacrifices for the Flaming God.Also there were vaults piled high with the gold destined for the fabled Lost Atlantis. And there La, the beautiful high priestess, still dreamed of Tarzan, who had escaped her knife before. Around her, the hideous priests vowed that he should never escape again. For now Tarzan was returning, and they were waiting for him. Tarzan planned to avoid La and the priests. But he could not avoid the earthquake that struck him down in the vaults and left him without memory of his wife or home -- only with what memory he had had as a child among the savage apes who reared him.
Lieutenant Albert Werper had only the prestige of the name he had dishonored to thank for his narrow escape from being cashiered. At first he had been humbly thankful, too, that they had sent him to this Godforsaken Congo post instead of court–martialing him, as he had so justly deserved; but now six months of the monotony, the frightful isolation and the loneliness had wrought a change. The young man brooded continually over his fate. His days were filled with morbid self–pity, which eventually engendered in his weak and vacillating mind a hatred for those who had sent him here—for the very men he had at first inwardly thanked for saving him from the ignominy of degradation. He regretted the gay life of Brussels as he never had regretted the sins which had snatched him from that gayest of capitals, and as the days passed he came to center his resentment upon the representative in Congo land of the authority which had exiled him—his captain and immediate superior. This officer was a cold, taciturn man, inspiring little love in those directly beneath him, yet respected and feared by the black soldiers of his little command.