The NCIS team investigate when the body of a Petty Officer is found by a father and a son duo on a fishing trip but the team soon discover that the supposed "Petty Officer" in question is actually a civilian as well as an investigative journalist. Meanwhile, Ziva gets a surprise when her estranged father who she hasn't seen in two years secretly arrives in the U.S., prompting Ziva to question her father's true reasons for being in the country in the first place although he insists he's arrived to see Ziva for a Shabbat dinner but tragedy lies in wait, threatening to change the lives of both Ziva and Vance forever...