Now isolated in a single frail human body, Breq, an artificial intelligence that used to control of a massive starship and its crew of soldiers, tries to adjust to her new humanity while seeking vengeance and answers to her questions.

On a remote, icy planet, the soldier known as Breq is drawing closer to completing her quest. Once, she was the Justice of Toren -- a colossal starship with an artificial intelligence linking thousands of soldiers in the service of the Radch, the empire that conquered the galaxy. Now, an act of treachery has ripped it all away, leaving her with one fragile human body, unanswered questions, and a burning desire for vengeance.