As the team searches for a former Irish Republican Army bomb-maker who was smuggled into the city, they are joined by Special Agent Hannah Khoury, Pride's replacement during his medical leave. Also, Pride considers a new position with the agency.

After a petty officer is found murdered under a shrimping boat, the NCIS investigation uncovers a conspiracy in the tight-knit local fishing community. Also, Lasalle awaits the final results of the tax fraud investigation into his family's company.