When a mystery man saves the life of a Lieutenant and then disappears from the scene, the NCIS team unravels a new case when forensic evidence suggests he is a soldier who was captured in Afghanistan years ago and never found.

The NCIS team protects a local DJ from a threatening perpetrator and investigates the murder of a Navy Captain who was attacked while on-air with the radio show. Also, Pride's daughter, Laurel, returns home to discuss her future plans.