A violent robber is loose in River City. Meet the cops that must take him down. Stefan Kopriva, a young hotshot. Katie MacLeod, a woman in what is still mostly a man’s world. Karl Winter, about to retire but with one more good bust left in him. And Thomas Chisolm, a former Green Beret who knows how dangerous a man like the Scarface Robber can be. These are the patrol officers of River City - that mythical thin blue line between society and anarchy.

When disgraced former cop Stefan Kopriva is asked by an old high school classmate to find a runaway 16-year-old girl, he reluctantly accepts. Driven by guilt over a terrible mistake that drove him from the force more than 10 years earlier, Kopriva battles old injuries, old demons, and long ago memories as he unravels the mystery of the missing Kris Sinderling and seeks his own redemption.

Tyler Garrett is a model SWAT officer whose good looks, education, and familial status add to that image. The fact that he is a Black man in the predominately white Spokane Police Department only adds to the city administration's pride in one of their own. One summer evening, Garrett stops a reckless driver. As Garrett dives for cover, the driver turns and begins shooting as well. Garrett survives the ambush by killing the driver and chasing off the additional shooter. The legend of Tyler Garrett grows. Until the initial investigation.

When Jacob Kidwell’s body is discovered, his death appears to be an accident. Major Crimes Detectives Quinn Delaney and Marci Burkett discover layers of deception wrapping the young man’s life. They also find someone meddling in their investigation—a friend of the deceased hoping to help. He’s sticking his nose where it doesn’t belong and creating new problems for the detectives.

Thomas Austin was once a prominent NYPD detective, known for locking up a psychopathic serial killer dubbed "The Holiday Baby Butcher". Now retired in a small beach town in the Pacific Northwest, Austin runs a little café, trying to overcome the loss of his wife, a DA who was gunned down only one year ago.