After a number of neighborhood residents are murdered, the police follow the investigation to a local racist who is murdering people he doesn't feel belong in his neighborhood. Stone finds himself facing a prominent black attorney representing the murderer.

When building superintendent Frank McKinnon is found murdered in the basement of the building he works and lives in, Logan and Briscoe initially investigate the crime as a potential break-in until forensics discovers that the "break-in" was staged. The state's attention soon turns to Sean, Frank's 17-year-old son. Dr. Olivet determines the son is an abusive sociopath after interviewing him. But when the victim's wife claims that Frank beat his family on a regular basis, Stone and Kincaid try to determine who is telling the truth.