HI, I saw this movie in the Aeroflot flight (Moscow to JFK) in 2018 or 2021. It’s about the story of parents who lives in rural area, snowy mountain. Their son is handicapped and the mother always gives him piggyback to the school. One day, at the doctor’s office, doctor tells father about son’s blood type does not matched to his. Father thought mother cheated on him and accuse her. He became violent and almost strangled her but it turns out their child is mixed up at the hospital when he was a newborn. In the end, they meet their biological son but mother just kiss and hug him. She sobs. It’s a great movie!