For the Living and the Dead (2005)

An ordinary suburban family is shattered when their youngest son is killed in an accidental fire while locked inside the family's car on their yard. Mother Marja can't stop crying, father Jaakko can't cry at all but blames himself for the fire. Their remaining son Timo develops problems at school because of his constant worries about his parents' safety. In their grief, Marja and her sister Leena have to confront an old family secret, their little sister's accidental death for which Leena has quietly blamed herself through decades.

Unfortunately the movie For the Living and the Dead is not yet available on HBO Max.