The aged and crumbling account of Fondalus as scribed by Tharakimeios may be the only surviving clue as to the fate of Colonel Rosentos's expedition and perhaps the resting place of the Essence-Orb of the Black Sage, which he is rumoured to have sought.

Now that scroll, like a map to hidden riches, lies in the hands of a small group. Did Rosentos find fabulous treasure or die in dark places? Did he betray his men to an evil sorcerer or did they share in his good fortune? Does the Essence-Orb reveal all knowledge that is asked of it, no matter how secret, or does it tell nothing but lies that lead to despair? The answers lie in wait for those willing to venture into the mists that shroud them.

The Treasure of the Hideous One is a classic Dungeons and Dragon wilderness adventure of exploration and adventure in which the player characters follow a century old tale in search of wondrous treasure.