A construction worker commits suicide after phoning Mac to confess that he took part in burying a body in the north end zone of Giants Stadium many years ago. The investigation reveals that a body is buried in the stadium and that the victim was executed with a shot to the head. The case becomes more complex when Mac learns that someone in the lab was present at the original crime scene. Back in Manhattan, Stella probes the murder of a bank executive who was stabbed to death in a hotel room.