The film struggles with a somewhat thin storyline, yet it still manages to showcase memorable portrayals from Déborah Lukumuena and Le'Shantey Bonsu. Lukumuena plays "Grace," who shares a modest apartment in a deteriorating Glasgow high-rise with her daughter, "Ama." Their bond is warm but complicated by some worry on Grace’s part. Because “Grace” has to work evenings as a cleaner, the girl isn’t usually allowed to l…