'Farewell'. So start events leading to the collapse of the Soviet Union.
The events are presented in a low key fashion. I'm sure had Hollywood filmed the story it would have been noisy and action packed with car chases and the like. However this French film, which has the 'novel' device of the French speaking French, the Russians speaking Russian and the Americans speaking English, only occasionally utilises noise, violence or suspense.
The 'reveal' at the end provides the film's punch as the missing jigsaw pieces are identified.
Definitely worth a look.