The Emperor's daughter Mercedes is the first woman ever admitted to The High Ground, the elite training academy of the Solar League's Star Command, and she must graduate if she is to have any hope of taking the throne. Her classmate Thracius has more modest goals--to defy his humble beginnings and rise to the rank of captain. But in a system rocked by political division, where women are governed by their husbands and fathers, the poor are kept in their place by a rigid class system, and the alien races have been conquered and subjugated, there are many who want them to fail. A civil war is coming and the machinations of those who hunger for power threaten the cadets. In a time of political intrigue, class conflict, and alien invasion, they will be tested as they never thought possible.