- Deeks goes undercover to investigate an arms dealer and cozies up to woman, Monica, to get information on her employer. Deeks rescues her when she is chased and shot at. She stole a bag of diamonds from her boss because she thought that's what Deeks was after. When Deeks shows doubts about the diamonds, Monica runs. They apprehend her and then she agrees to go undercover to capture her boss.
- It turns out that the diamonds were going to be payment for a nuclear bomb from Sidorov. He is getting ready to sell the nukes.
- Deeks' relationship with Monica strains his relationship with Kensi.