Sam assumes a former alias in a risky undercover operation to take down an elusive drug lord. Also, Hetty interrupts Callen and Anna's romantic night to assign them a prisoner escort mission.

After an engineer who was developing a new guided missile destroyer is murdered, Callen and Sam go undercover to track his co-worker aboard a plane to Tokyo to sell the classified intel. Also, Deeks plans a surprise get-together for Kensi and her out-of-town friends.