Police Precinct 23 was located in the Northwest District of the big city. A three story complex with multiple rooms for their officers and investigators, ad underground parking to house their police cruisers and disguised vehicle, and sitting right next door to the city’s forensic services building.

Due to the complexity of the Northwest District, officers often deal with acts of homicide, robbery, kidnapping, hacking, blackmailing, missing reports, and so on within a single act of crime. In order to adapt, Precinct 23 is among the ten stations across the big city who deploy plainsclothes detectives to blend into society of high and low while handling cases that evolve on an everyday basis.

They were known as Criminal Investigations Detective, also known as C.I.D.