A riveting police drama about the men and women of the Chicago Police Department's District 21 who put it all on the line to serve and protect their community. District 21 is made up of two distinctly different groups: the uniformed cops who patrol the beat and go head-to-head with the city's street crimes and the Intelligence Unit that combats the city's major offenses - organized crime, drug trafficking, high profile murders and beyond.

Mayor Tom Kane sits like a spider at the center of Chicago's web of power; a web built on a covenant with the people. They want to be led, they want disputes settled, jobs dispensed, and loyalties rewarded. If he achieves all this through deception and immorality, so be it. As long as he gets the job done, they look the other way. Yet despite being the most effective mayor in recent history, a degenerative brain disorder is ripping everything away from him. He can't trust his memory, his closest allies, or even himself.

Experienced Green Beret sergeant Johnny Gallagher is escorting a prisoner, Airborne Ranger Thomas Boyette, back to the US, but Boyette escapes and Gallagher must risk life and limb to catch him.

Former top U.S. security adviser Elizabeth "Libby" Lamm is threatened by associates from her dark past including Rachel Burke a steely, commanding politician with an unwavering knack for achieving her goals. Colluding with Rachel is Adrian, an unyielding, patriotic chief of staff. Martin harbors another type of obsession with Libby in this story of betrayal and regret.

As Emma works to create a beautiful Christmas for the children she is looking after, the warm glow of the Christmas tree and the sparkling of the ornaments are in stark contrast with the hostility of the children in their freezing house.

A son returns home to meet his father and reveals how one man’s unchecked appetite destroys both everything he loves and the town that made him great.