The Ceveans and the Storrions have been locked in a brutal war for as long as anyone on the world of Alcyone can remember. Now however the planet is dying and both peoples need to leave before its destruction dooms them all. Led by their High Priestess, Amiel, the Ceveans build an ark--a great city atop a giant robot. Before they are able to flee however, the Storrions attack, enslaving many of the Ceveans and ejecting the rest out into the wastelands. The High Priestess vanishes and it is only later that the Storrions realize she is the only one who can pilot the Ark. The Storrions move into the city atop the Ark, but now it is little more than a prison and the threat of the planet's destruction remains ever-present. Now both peoples search for some sign of the high priestess and some hope that they'll get off Alcyone alive...