Wartime Tokyo. A boy named Mahito loses his mother in a hospital fire. Years later, his father remarries his mother’s sister, and they move to the countryside. A talking grey heron leads Mahito into an abandoned tower — and into a world ruled by an ancient great-uncle who must choose a successor. Miyazaki’s thirteenth feature, made when he was 82, doubles as both an autobiography and a final meditation on what a creator owes the world he is leaving behind.