NCIS investigates a private plane crash after a Navy pilot says she saw an unidentified object prior to the crash. Also, Pride suffers from insomnia and nightmares as a result of being kidnapped and drugged last year.

The NCIS team uncovers a sinister plot by a private detention center contracted by the government to house undocumented immigrants. Also, Lasalle and Sebastian travel to Alabama to search for Lasalle's missing brother.