Conan, Jezmine, and Snag are travelling through a forest when they come across a band of warriors led by a youth, the ruler of the local land who was recently ousted by Serpent Men. Wrath-Amon captures the castle and a mystical tomb of the Serpent Riders of Set, seven mystical "horsemen" which served Set long ago and who can be resurrected. Conan and the others agree to help the youth regain his castle.