Callen, Sam, Kensi and Deeks join Hetty’s team from the Vietnam War, Sterling Bridges, A.J. Chegwidden and Charles Langston, in a dangerous and off-the-books rescue mission to save Hetty from…

The team must find assailants who illegally crossed the border and attacked California Highway Patrol officers; Homeland Security sends Nell’s older and bossy sister to assist with the case.