A woman digs herself out of a grave in Rock Creek Park and comes to NCIS's attention after claiming that there's a bomb on a Navy ship but she's suffering from memory loss. As Gibbs and Tony investigate the case, Kate develops a bond with the woman and begins looking after her despite Gibbs's belief that the woman could be involved. However when they find a dead body in a hotel room that the "Jane Doe" also happened to be in before she was buried, the team start to suspect that the woman has a secret, something that could be devastating for the entire team in the long run....