The discovery of a body in Hell's Kitchen that had been wearing a $40,000 diamond ring leads Briscoe and Green back to the September 11th attacks, as the victim had been reported to have died on the 89th floor of the World Trade Center. The ensuing investigation leads to a fiancee and a lover and the determination that the events of 9/11 may have been convenient timing to hide the fact that she was murdered the night before.