While at a country bar, a Marine disappears under mysterious circumstances, prompting NCIS to be called to investigate. The case then takes an abrupt turn when the team learn that several other fellow Marines from the missing Marine's unit have also vanished without a trace. When skeletal remains of one of the Marines who disappeared are found chained in a sewer pipe in Old Town Alexandria, Gibbs and the team begin to suspect that the unit's C.O is the one responsible for the disappearances and eventual deaths. But when Tony goes missing after having been at the same country bar that the missing Marine was at, Gibbs and Kate with McGee, Abby and Ducky's help race against the clock to rescue him and find the missing Marine before it's too late. However, an unlikely figure emerges as the tru