How do we begin to put ourselves back together after everything falls apart? After our hopes and dreams suddenly go up in smoke? That’s the sort of question that lies at the heart of the often painful Pieces of a Woman, a stark tragedy awash in the harsh coldness of a Massachusetts winter. From director Kornél Mundruczó and writer Kata Wéber, this character study benefits from a career-best performance from Vanessa Kirby as Martha, a woman undone after the death of her baby.