The Simple-Minded Murderer (1982)

In the 1930s, the feeble-minded Sven's mother dies and he is hired as a farm-hand at the rich, affluent Höglund's farm. He has to work without pay and sleeps together with the cows. He meets the disabled Anna who is the first one to treat him as an adult. One day he has had enough of Höglund's maltreatment and moves in with Anna's family.