After fifteen years of war, Pellucidar's slavemasters, the dread Mahars, had been conquered. But the young Pellucidarian Empire, ruled by David Innes, was unprepared to face a new menace, the deadly Korsar pirates. Bravely the Empire's primitive warriors fought, but many were lost -- and Tanar of Sari, one of Innes's most courageous warriors, was captured. All through the terrors of the hideous realm of the Buried People of Amiocap and the unspeakable...