The team receives the USB drive. They review the photos and the picture of the victim. Callen realizes the girl was the Russian who lived near his last apartment. He says the girl was the last person he saw before he was shot. They team learns the oldest photo was taken eight days ago and the most recent was shot yesterday. They wonder who the girl was working with. Kensi informs the team taht the body was found at the marina.

Nate asks Hetty to access a personnel file on Callen. Hetty goes to her secret computer and looks up Callen's file. Nate says they have a lead on Callen's shooter just before he looks through the records.

Kensi, Callen and Hanna arrive at the marina. After seeing Callen and Hanna bicker, Kensi compares them to a married couple. They enter the victim's room and examine the scene. They figure there was a camera that pointed out to the yachts. They wonder if the Russian was a professional and broke in, but Callen figures she had a key. Kensi meets with the landlord and asks him if she can move in short term. After the landlord offers to lease the apartment to Kensi with cash, she looks at her watch. She announces her time to Callen and Hanna who placed a bet on how fast she can get an offer. Hanna says he is not going to pay up. Kensi admits she works for NCIS and asks about the Russian girl he rented to. The team obtains a surveillance video from the apartment. They see a man leave the apartment carrying a camera tripod. They see him cover his face since he knew the camera was there. Dominic reports the Russian uploaded files to a remote server. After they load a file labeled Cossack, Callen sees pictures of two former comrades. Eric discovers that Callen's teammates were killed the same day he was shot.