Fresh off the drama several months ago that included a shootout at Rosslyn Station, the last Metro stop in Virginia, and a conflagration at the Federal Courthouse in Washington, D.C., Fairfax County Detective Sergeant Kiki Diaz is leaving an interview in McLean, Virginia when she hears a news report that Virginia Governor Edwin Mills has been assassinated at his Fairfax Station home. She immediately heads to the scene - and as a newest detective assigned to the Robbery-Homicide squad - she’s got the ticket on this one.

Diaz was warned by the captain in CID before she arrived that the State Police are claiming they have the lead on the murder since they had a security detail on the Governor, and as predicted she runs into problems as soon as she arrives. An overly friendly State Police CID special agent in charge from Richmond appears to want to help, but Diaz is not so sure.

Things go from suspicious to dangerous as the list of potential suspects in the Governor’s murder add up, and Diaz can’t tell if the problems are from the numerous subjects, or her alleged partners in the investigation. Soon into the investigation, the murder of a State Trooper several miles away seems like it might be related. If the state boys were territorial about the Governor’s murder, they have completely frozen her out of this one. Then, the lead State Police special agent on the trooper’s murder, a young lawman from Richmond, comes under Kiki’s spell. And she might be falling for him too.

In her quest to identify the Governor’s killer, Diaz dodges bogus leads, State Police head fakes, and as usual it seems lately, her own Internal Affairs problems. She also struggles with the notion that eleven years into the job, it's becoming her bridegroom. Buckle in for the ride, because Kiki Diaz in Fairfax Station is Wonder Woman meets Law & Order: SVU.