Cahokia recovers from a year of chaos following a near civil war and the god incarnate, Morning Star, has declared that his human sister Night Shadow Star and her slave Fire Cat must make a dangerous journey to far off Cofitachequi. For an old threat has arisen on the other side of the great eastern mountains - their brother, Walking Smoke, a madman who is convinced that he is the true deity destined to rule Cahokia.