The film cuts between harsh, handheld realism (snow, rusted barracks, indifferent officers) and tender flashbacks: Alyosha as a boy, catching dragonflies in a jar; Sima teaching him to peel potatoes; the last New Year’s Eve before he was drafted — a dance to an old cassette tape, his laugh like cracked ice.

The screen cuts to black.

Sima looks into the camera — breaking the fourth wall — and says, “This is not an ending.”

In a cramped Khrushchev-era apartment on the outskirts of Moscow, Sima Morozova, a 48-year-old factory nurse, receives a letter that will crack her quiet life open. It’s from the army: her only son, Alyosha, has gone missing during a training exercise in the Urals. No body. No explanation. Just “desertion suspected.”

Sima refuses to believe it. The same mouth that once sang lullabies to him now spits at the district military commissar. She takes a leave from work, pawns her mother’s gold earrings, and boards a rattling train east.

However, I can based on the plausible deciphering: Deciphered guess : "Film Russian Mother 2016 — watch online — my Sima 1" So: a 2016 Russian film about a mother, possibly titled or nicknamed "Sima", part 1. Here’s a story built from that: Title: Sima’s Winter (2016) — Part 1

“May syma” — that’s what he called her when he was small, mispronouncing “mama” into something only theirs.

To be continued in “Sima’s Winter — Part 2.”

Part 1 ends with Sima at a frozen lake near the base, holding a single boot she found buried in the snow. A local old woman whispers: “Some boys run from war before war finds them. But the mothers never run.”