Who—or what—is "OMHA"? For over a thousand years the alien Gaddyl have ruled Earth, reducing men like Murno to bare existence and a Stone Age technology. Now the Gaddyl have changed their tactics, and men are to be hunted and slain like animals. The only hope for man is in the mysterious slogan, "Omha Abides!" If Omha, the long-promised savior, exists, then Murno must find and awaken him...or it. Pursued by the Gaddyl and their savage mutant hunters, Murno must make his perilous cross-continent journey on foot in search of a legend. And if he fails, mankind dies. . .