A confrontation in an alleyway between DiNozzo and a man impersonating an officer in the United States Navy leaves the impostor dead. As DiNozzo is grounded to his desk following an IG investigation which will ultimately determine whether or not he acted accordingly in terms of shooting the man dead in self-defense, the rest of the NCIS team tackle the case and soon discover that it may be connected to a high-profile female Senator while Anthony DiNozzo Senior who has returned to Washington D.C. and who witnessed the confronation and subsequent shooting has a secret to reveal to his son.