Letter Never Sent
Неотправленное письмо (original)
Historia de un pequeño grupo de geólogos soviéticos en busca de diamantes en Siberia.
Starring Innokentiy Smoktunovskiy, Tatyana Samoylova, Vasiliy Livanov, Evgeniy Urbanskiy, Galina Kozhakina, Boris Kozhukhov
It's a drama and action & adventure movie, and has a rating of 7.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Brazil.