As a CIA officer, an oath was sworn by Evelyn Salt to duty, honor and country. Her devotion is going to be analyzed once a defector accuses her of being a spy. Salt continues away from home, with all of her skills and years of experience to elude capture. Salt's efforts to prove her innocence only serve to cast doubt on her motives, as the hunt to find the facts behind her individuality continues and the matter remains:"Who's Salt?"