Empress Josephine has set her sights on Venus. No sooner have Tiffany and Marisol returned to Earth aboard the captured frigate Merlin than they must race to save the Venusian skycities from Saharan attack. Betrayed by their admirals, the androids of the Royal Australian Space Navy are forced to take charge of their own fate. But as the line between man and machine blurs, they must ask, is becoming more human a good thing?