After a stint in the private sector, working at the largest hedge fund in the world, Nora Carleton has returned to her former role as a New York City federal prosecutor. And she’s arrived just in time to face one of the most dangerous domestic terror attacks in the history of the city.

A threat is building in the city, with far right extremism powered by internet demagogues and funded by shadowy organizations. Together with legendary investigator Benny Dugan and aided by colleagues at the FBI, Nora builds a case against the key players in this burgeoning movement, arguing before a jury that some speech is actually a deadly crime. But the menace taking root is far bigger than any courtroom, and as the militants target an upcoming United Nations rally, Nora and her team must race to disrupt the plans and minimize casualties.