The newest victim of a serial killer is found brutally murdered. Detective Karen Bettancourt, who had been working for eight months with Detectives Tom Selway and Marty Russo on the case, now finds herself re-assigned by the precinct's Lieutenant, Fisk, to partner with Dunbar on the investigation of a stolen car. Just as a resentful Bettancourt begins to think she's being completely marginalized in this new dynamic, Dunbar discovers that the stolen car may be connected with the string of murders.