Amidst the foggy evergreen forests of Washington State's Olympic Peninsula, private investigator Leigh Hearon explores the criminal underbelly of a small town that has been transformed by the loss of manufacturing jobs and the invasion of meth and opiates. Recently employed by a local public defender on a case of attempted matricide, INVESTIGATOR delves into Hearon's personal motivations and her place in the criminal justice system as she reaches the latter part of her thirty-year career.