Betrayed, drugged into oblivion, and captured--thus came Tarzan to be a prisoner in the deepest dungeon of Opar, lost Atlantis city of gold. But even as the flames of treason engulfed La, Queen of Opar, she sacrificed all to rescue him. Followed by Tarzan's fierce golden lion, Jad-bal-ja, they escaped into the deadly Valley of the Palace of Diamonds, where cruel bejeweled gorillas hungered to destroy Queen La and Tarzan, Lord of the Jungle.