The murder of a psychologist leads to a case involving a computer company that sells information and their responsibility in shielding their clients' history in order to serve their needs.

The execution style shooting of a city contractor leads Detectives Briscoe and Green to suspect a professional hitman. They first focus upon possible enemies of the victim, but end up suspecting the victim's wife and her boyfried of hiring the killer. However later discovered evidence leads McCoy and Southerlyn to a conspirator that no one had suspected.

A journalist's suicide becomes suspect after Green and Fontana find evidence at the scene suggesting that it wasn't a suicide after all.

When an environmental scientist, Dr. Oscar Silva, is poisoned during a global warming symposium, Detectives Cyrus Lupo and Kevin Bernard initially suspect competitors from Dr. Silva's field of study. It is soon discovered that Dr. Silva is involved in a messy custody battle with his wife’s ex-husband, Phillip Shoemaker and the focus of the investigation quickly shifts to the victim’s family. Meanwhile, the case becomes personal for Cutter as it stirs up unpleasant memories from his own past.