Gibbs, McGee and Torres travel to a remote area of Paraguay, controlled by a group of violent rebels, in an attempt to locate a missing Navy Seal.
On Halloween, Mike and Chuck decide to spend the evening watching football instead of passing out candy with their wives.
Callen and Sam cross the border into Mexico and go undercover as food truck owners to find the source of an anthrax poisoning.
To avoid prostitution, Teresa offers to be a drug mule and is put to the test. Meanwhile in Mexico, Brenda and her son try to evade Epifanio's thugs.
After learning the hotel maid will be killed, Teresa scrambles to help her escape to safety. A man from Florida comes to avenge his brothers' deaths.