Alliances shift as Kara teams up with Andrew, the leader of the Academics. Each are motivated by the death of a close friend, and each must face their own personal demons before they can work together effectively. 

Matt, now separated from Kara, has to make a decision: Does he trust Kara's judgment about the state's atrocities, or does he return to the life he's known for so long as a soldier of the state? 

Friends fight against friends as a cobalt-bomber is assigned to destroy the heart of the state's leadership. Matt, Kara, and Andrew have to decide what they stand for, what side they're on, and they have to do it before a cobalt-bomb kills the people closest to them.