Stone and Keller investigate the death of a cop who dies during a drug sting—and tries to prevent the cop's partner from doing any more damage.

A sniper is randomly shooting people in a high-rise building and threatens to continue doing it until he is paid a million dollars.

The wife of a prison inmate is shot and killed in a laundromat in what looks like a professional hit.

After Jeannie's friend Nancy kills one of her rapists, Jeannie is furious at the way the justice system works.

After one of his fellow teachers is killed on the schoolyard during a fight between two students, a veteran former teacher kidnaps four troublesome students and holds them in an abandoned private school.

Stone is hit by a getaway van after a robbery, but manages to shoot one of the robbers. When the man dies, his wife and accomplice vows revenge against Stone.