After a Navy Lieutenant from a well-connected and affluent New Orleans family has a fatal fall down a flight of stairs at a charity gala, the NCIS team investigates whether his death was an accident or foul play.

Tammy is convinced that a con man committed the hit-and-run murder of a Navy doctor, even though the evidence shows otherwise. Also, unbeknownst to Hannah, her husband, Ryan Porter, approaches Pride with new intel on Apollyon, the underground spy network responsible for murdering his father.