Canadian writer-director Sophy Romvari’s debut feature, the luminous Blue Heron, is revelatory—even as it intentionally offers no revelations. If you saw Romvari’s 2020 short film Still Processing (all her shorts are on the Criterion Channel), you’ve observed the director’s careful application of context, bringing the audience to understand the extent of her family’s grief without divulging many details. Grief, after all, fits no narrative, no timeline with a clear beginning and end.