The year is 1974, and Barbara Dean (Judi Dench), a British assistant manager in a foreign bank in Saigon, begins a relationship with American Bob Chesneau (Frederic Forrest). She quickly realises that he works for the CIA and he knows that the fall of South Vietnam is very near.

The year is 1974, and Barbara Dean (Judi Dench), a British assistant manager in a foreign bank in Saigon, begins a relationship with American Bob Chesneau (Frederic Forrest). She quickly realises that he works for the CIA and he knows that the fall of South Vietnam is very near.