The murder of a petty officer leads Pride and his team to a mysterious woman who is targeting men with high security clearance. Also, Lasalle’s father, Beau, arrives in town to discuss the family business.

During the annual Contraband Days pirate festival, the NCIS team investigates the murder of a Navy captain who was searching for a valuable 200-year-old marble and gold fleur-de-lis.

Following a deadly car explosion in the French Quarter, the NCIS team interrogates a professor and former member of a student protest organization. Also, Tammy discovers a secret about Hannah’s personal life.

The team investigates multiple murders tied to a construction company creating an experimental chemical that strengthens sea walls. Also, evidence from Hannah’s previous mission in Oman is used against her as blackmail.

The NCIS team investigates a deadly bombing at a military museum event with over 1,000 people in attendance.

Navy Lieutenant Max Landry asks the New Orleans field office for help when he suspects his girlfriend is a spy. Also, Lasalle faces another devastating dead end as he searches for his brother’s last known whereabouts.

When a man impersonating Lasalle attempts to free a young woman from jail, the team investigates both the imposter and the prisoner. Also, Pride's daughter pays him a surprise visit.