While Rose, the medical examiner, conducts a postmortem exam, two intruders blow away her assistant and steal the corpse and a van, but Rose evades; she calls the Callen team, who investigate because of an apparent Navy connection with the body. Kensi and Deeks check out the abandoned van; inside they find something exciting; they also see the victim's pad and his girlfriend. A Navy commander briefs the team about a highly classified new system for tracking people; he assures them that it does not exist anywhere inside ConUS, but suddenly it does exist and function in Los Angeles. While Kensi and Deeks watch a mosque, they see a suspicious man, then follow him, as do G and Sam, who next make a gruesome discovery inside a hospital, and G does a gruesome task; Eric and Nell continue to produce; Deeks takes a swim; the team figure out the puzzle, and they catch two bad guys; more are missing, along with some nuclear material, but Hetty says that that's tomorrow's work.
—DocRushing