When Tony meets his father at the Adams House, he seeks to question a man wearing a suspicious dress-blue uniform of a Naval officer; the man draws a pistol and threatens Tony and his father; Tony kills him with two shots. Abby says that the impersonator was an infamous private investigator; Tony deals with an unlikable investigator from the office of the inspector general; at the hotel McGee and Ellie find the body of an executed man, who worked on the staff of a woman senator. Abby gives the investigator a cold treatment; Tony and McGeek check out the PI's office; Gibbs and Ellie meet the senator and her staff; Senior lays news on Junior. The gang uncover international wealth, influence, and bribery, then Gibbs and McGee meet with the senator and several of her staffies; McGee places a phone call, and everything falls into place. Tony sees an old friend, and he and his father share a happy goodbye.