Four Chicago police officers are gunned down from long range by a sniper. Chicago is officially on notice that a siege is underway on the city’s men and women in blue.

Over the next six days, eleven more meet their deaths at the hands of a sniper whose moniker is Janus. Detective Harry Sanchez and his partner, Yulia Walczak work day and night to track down the sniper whose agenda is clear—kill as many police officers as possible.

But without a name or a face, they are chasing a ghost. Under enormous scrutiny from the police brass, Harry enlists the help of an old friend, Cailan Bane, a former Recon Marine sniper whom the Taliban called the Death Whisperer.

Based on the way the killer sets up his shots, Cailan concludes the sniper is a pro, most likely a former member of a Special Operations group. He is probably using a take-down rifle that can be carried in a backpack.

The upshot is that the shooter is a gray man, undetectable in a crowd. And he has a serious beef with the CPD over some unresolved past injustice.

Sanchez is desperate to stop the sniper but going after a man who can deliver death without warning from a thousand yards is too dangerous for any police officer. So, Cailan agrees to step in and hunt down the killer because while the sniper is good, Bane is the best.

And when the Death Whisperer goes hunting, even the devil runs for cover. .