The NCIS team investigates the murder of a Navy Officer with the highest level top secret clearance who was recently assigned as a tech liaison with a private developer. Also, Pride transforms the carport into an auto shop as he works on the first car he ever gave his wife.

After a stolen Navy-issued gun is found to belong to a Chief Petty Officer who died 40 years ago, the NCIS team reopens the cold case, one that Wade has personally tracked and investigated for years. Also, the team prepares for their annual Thanksgiving dinner together.