Gibbs and the team are called in when a recently deceased man is found encased in a Civil War-era tomb. The corpse is that of a missing Staff Sergeant who, according to Ducky, was buried alive. Using cell phone records from a phone found inside the casket, Abby tracks the victim's final phone calls to a bank and safety deposit box that contains a map the Staff Sergeant died protecting. Meanwhile, Director Shepard informs Gibbs that Agent David will now be a full-time member of his team.
