Detective Billy Harney is the newest member of Chicago PD's elite Special Operations Section (SOS). When a drive-by shooting on the Chicago's west side turns political, he leads the way to a quick solve. But Harney's instincts run deep. As a population hungry for justice threatens to riot, he realizes that the three known victims are hardly the only ones. Asking questions about who's to blame, Harney finds the easy answers prove to be the wrong ones. Soon Harney's quest to expose the evil that's rotting the city from the inside out takes him to the one place he vowed never to return: his own troubled past.