Grief tends to be one of those taboo subjects that many of us are reluctant to talk about, let alone address. But, by failing to do so, we may end up saddling ourselves with a tremendous burden that weighs us down and from which escape can be difficult. That’s especially true for those who’ve experienced devastating losses through such events as the death of loved ones or, even more horrifically, through traumatic experiences, such as being a firsthand witness/survivor of the Holocaust. Those are among the painful human tragedies experienced by a diverse but connected collection of scarred individuals in this impressive directorial debut from actress Scarlett Johansson.