Director Shepard takes a huge risk and agrees to meet an informant alone, but the meeting goes bad and her contact is killed. Gibbs and the NCIS team attempt to gather the information the man was going to supply or risk losing their nemesis once again.

With little evidence, the team turns to Scott (Billingsley) to re-create the scene of the crime using his heightened senses of hearing and scent to track down the Petty Officer's killer. Meanwhile, Tony and Gibbs struggle with personal relationships.

Gibbs ignores the bureaucratic paperwork associated with his "acting" director duties and leads an investigation for a murder victim found in a taxi headed to NCIS headquarters. Meanwhile, Jenny discovers a secret about her past.