Todd Hauser dies in an emergency room after experiencing stomach pains. Massive internal bruising is determined as the cause of death leading detectives Lupo and Bernard to uncover the victim's involvement in street fighting. The detectives look for a helpful witness and usable evidence. When Hauser's street fighting opponent gets a lesser sentence than the victim's family hoped for, his brother and friends take matters into their own hands.
Rick Devon's body is found in a park, and the death is assumed to be drug related. Detectives Cyrus Lupo and Kevin Bernard stumble find a key in a bathroom that could have been left by the killer.
Detective Lupo and Detective Bernard are called to a crime scene where Nancy Hartwig has been found murdered. They find out her husband insisted the family live environmentally friendly to avoid leaving a heavy carbon footprint.