[2] Set in the fictional Prehistoric Thurian Age, it deals with a disillusioned King Kull questioning the meaning of existence, leading him to seek the assistance of a two-faced wizard.

Kull, King of Valusia, suffers from a severe depression which not even his friend and ally, Brule the Spear-slayer, can rouse him from.

A mysterious woman later whispers to Kull that he should visit Tuzun Thune, a wizard of the Elder Race, who supposedly knows the secrets of life.

Brule explains how Thune was involved in a plot to kill the king, as was the woman who first suggested Kull visit the wizard.

But for the rest of his life, Kull is haunted by questions about what really happened to him in Thune's mirror, and they leave him even less certain about the nature of reality.