The death of a Petty Officer leads the NCIS team to a teenager in Sam's life. Meanwhile, Hetty is concerned about the effect that the workload is having on the team.

The NCIS team races to save one of their own when they receive video evidence of Special Agent Dominic Vail being held hostage months after he was kidnapped.

The NCIS team is on the hunt for a terrorist who escaped Army custody during a secretive transfer in Los Angeles.

Sam goes undercover as a prisoner to track down a terrorist group responsible for several bombings around the world.