Karra is sentenced to death. The only one who can save her would kill her himself, except he has also been imprisoned.
The future of the City depends on them. Shot by her own Security guard, Karra fights for her life. She has more than one fight in front of her. She must also find a way to survive prison, because those who incarcerated her want her dead.
So does Jem, who has now trained an army of assassins to get rid of her, and any who stand in his way. She is the only one who can stop him.