Mac finds himself in the center of a political firestorm following the death of a serial killer in Mac's custody. As the NYPD Advocate tries to prove Mac didn't follow procedure, Mac gets some help from the last person he would expect. The assistance ultimately helps him turn the tables on his nemesis Deputy Inspector Gerrard. Across town, the rest of the team investigates a case where John McEnroe is their number one suspect in the murder of a man found impaled on a condom machine. Despite McEnroe's plea of innocence, his DNA is found at the scene and his history of having a bad temper doesn't help his case.