A man stumbles out of a park, having been shot and the team discover that he's a Marine who went missing in action during a mission in Afghanistan six years previously. During the investigation, the team soon learn that the Marine now has two completely separate lives and that he's also married to two different women but the case becomes a murder investigation after the man dies while Tony interviews him, prompting the team to search for the one responsible for shooting the former Marine. Meanwhile, Ducky's strange behavior has the team, Abby and Ziva especially concerned.