After Pierce witnesses a gallery owner die during a seizure caused by a video installation, he convinces Moretti that it was actually a murder. Their search for the killer puts them in the middle of a brazen art heist. As Pierce works on the case, he is forced to re-examine his relationship with Natalie. Featuring guest star Francesca Eastwood.

Donnie and Moretti are caught in the crossfire when a sniper shoots up the lobby of the Federal Building. When Pierce determines that the shooter is afraid of Extreme Low Frequency radio waves, he and Moretti take a trip to the Quiet Zone in Virginia, where they think the shooter is hiding out. Meanwhile, an alluring woman named Shelby Buchanan courts Donnie to run for political office.