A Navy captain, soon to retire from the Supply Corps, dies of three gunshots about 02:00 in a marina in Norfolk while wearing his blue monkey suit, including a gold cummerbund and white gloves; Gibbs and company investigate. The major witness is Joann Fielding, Gibbs's first mother-in-law (Shannon's mother and Kelly's maternal grandmother). The facial sketch produces an anomalous result, then Abby spots a significant discrepancy, and she finds a connection to a bridge coat and the shoulder boards. Gibbs tells Joann that her story does not add up. When Tony and Ziva check a lead in Nogales, Arizona, on the Mexican border, they get a rude surprise. Gibbs and Tony interview a Navy lieutenant involved with the victim. Ducky tells Gibbs quietly that he feels sure about a certain point. Gibbs puts all the pieces together, then he and "MAllison" work out the details. Palmer introduces an embalming assistant.