모정 (1958) / A Mother's Love (Mojeong)

A woman who has never been able to have children opens her door to a boy who says her husband is his father, sent by a birth mother too ill to keep him. What begins as a betrayal she wants out of the house turns, slowly, into the thing she was missing.

Why it's free: Free on the Korean Film Archive's own channel; the national archive holds the rights to the restorations it publishes.