New Orleans, September, 1862. Union army security officer and Pinkerton agent Nathanial Adams, working alongside ex-confederate officer and police investigator J.W. LaPlant, is closing in on a prime suspect in the brutal murders of over a dozen women. But spies are everywhere, and keeping their investigation under wraps has become impossible. And it soon becomes obvious that this serial killer is tied to people and positions that are protecting him at every turn.