Dead Man's Letters (1986)

"Dead Man's Letters" is a 1986 Drama movie directed by Konstantin Lopushansky and starring by Rolan Bykov, Iosif Ryklin. In a desolate world following the nuclear apocalypse, a scholar helps a small group of adults and children survive in the basement of a former museum of history. In his mind, he writes letters to his only son that will never be read and tries to find shreds of hope in his new reality.