NCIS investigate the robbery of a high-end arts storage facility by going undercover as potential buyers on the black market, to find who is behind the stolen items.
The team help Naval Intelligence Officer Akhil Ali locate a fellow officer who went missing while recruiting foreign assets as potential sources of intelligence; Callen and psychologist Nate Getz track down a man.
When agent Lance Hamilton's partner is killed, Sam dons his previous undercover persona of `Switch' to find the culprit; Kensi, Deeks, Roundtree and Kilbride work to catch an aerospace engineer who stole classified navy schematics.
The NCIS team must quickly find Callen after he falls for Katya's trap using Sam's deepfake to coordinate a weapons deal.