The Radch are conquerors to be feared - resist and they'll turn you into a 'corpse soldier' - one of an army of dead prisoners animated by a warship's AI mind. Whole planets are conquered by their own people.
The colossal warship called The Justice of Toren has been destroyed - but one ship-possessed soldier has escaped the devastation. Used to controlling thousands of hands, thousands of mouths, The Justice now has only two hands, and one mouth with which to tell her tale.
But one fragile, human body might just be enough to take revenge against those who destroyed her.