The Michigan National Guard failed to secure the ruins of Detroit due to the robotic defenses that cut their armored vehicles wide open. So the military pulled their survivors back and setup a cordon around Detroit. It wasn’t a very good one, and it had tons of holes that smart people could sneak through. So while the military sent in their Jane to deal with the robots, Twilight and her crew snuck themselves into the city and began working to uncover the terrorist sympathizers in Detroit. It turned into a much more dangerous search than they expected. They also turned up far more allies than they expected. The local government was not as popular as they claimed to be.