"The Tower of the Elephant!"
Conan tries his hand as a thief in Zamora, in its city of Arenjun, reknown for its legion of thieves. He learns of a great jewel, the Heart of the Elephant, kept in the Elephant Tower by the wizard Yara.
Yara is greatly feared by all, but the temptation is too great, and Conan makes his attempt. The traps are many and deadly, but soon Conan is inside. He finds riches to stagger the imagination, but that's not the least of it.
Captive in the tower is an ancient and alien being with the head of an elephant, Yag-Kosha. The last of his race and a mystic, he first taught the wizard Yara his lore before being betrayed.
Now imprisoned, Yara tortures Yag-Kosha to obtain the secret to the Heart of the Elephant. Yag-Kosha implores Conan to end his misery, and in so doing, gains his revenge on Yara. Conan departs empty handed.