During artillery practice a group of Marines find the dismembered body of a Navy ensign, Aaron, who provided communication support to a SEAL outfit; Callen and company investigate; the fearless foursome visit the SEALs aboard Aaron's training base, where they meet defiance, hostility, and uncooperativeness; Nell gives a lead, so the team check a home, where a car leaves fast; the team learn about the relationship between Aaron and the ex-girlfriend of one of the SEALs; Sam finds out who bought a knife of a particular type. G, Kensi, and Deeks find much circumstantial evidence pointing to the SEALs, but Sam refuses to believe that the SEALs would kill for jealousy. Hetty, Eric, and Nell uncover some of Aaron's other activities. Sam attends a SEAL-to-SEAL meeting, during which he hears the whole story; he then takes care of the matter; Callen learns the cause of death. The SEAL team then heads to Pakistan and completes a risky rescue mission.
—DocRushing