On New Year's Eve, Detroit Police Department's Sergeant Jake Roenick, veteran cop Jasper O'Shea and secretary Iris Ferry are the only people on site at the soon-to-be-closed Precinct 13. Roenick is deskbound and abusing alcohol and prescription drugs, haunted by a botched undercover operation eight months prior that resulted in the deaths of two members of his team. Psychiatrist Alexandra Sabian is treating Roenick at the station.