Late in the startlingly intense Closure, the disconsolate father at the centre confesses, “No one teaches families how to live.” This single statement gleans the inevitable reckoning propping the film’s agonising central journey. Premiering in the World Cinema Documentary Competition at Sundance, Michal Marczak’s Polish-language doc channels a hapless, helpless pursuit of a missing son into a mournful meditation on the unknowable distance between ourselves. In 2023, the 16-year-old Krysztof, or “Chris,” walked out of his home at 4 AM, took a bus to Warsaw, got onto a bridge across the mighty Vistula river, waited and vanished, when a rotating CCTV camera tracked back. Ever since, his father Daniel has been consumed in untangling his disappearance. Days looped into months, yet no concrete leads surfaced.