For just a moment, things seem to be under control for the soldier known as Breq. Then a search of Athoek Station's slums turns up someone who shouldn't exist—someone who might be a refugee from a ship that's been hiding beyond the empire's reach for three thousand years. In the meantime a messenger from the alien and mysterious Presger empire arrives, as does Breq's enemy, the divided and quite possibly insane Anaander Mianaai—ruler of an empire that's at war with itself.
Anaander is heavily armed and extremely unhappy with …