A giant hornet queen wakes from hibernation in a temple garden in a mountain valley in Japan and begins building a nest that will grow into a colony of armed workers. Through spring and summer the film follows her offspring as they range across the valley hunting other insects, including the local honeybees, and mounts a season-long account of the escalating conflict between the two species. The hornets attack in raiding parties capable of wiping out a hive in hours, and the bees respond with one of the more unusual defenses in the insect world: clustering around an intruder in a tight ball and vibrating their flight muscles until the heat inside the cluster cooks the hornet alive. Cameras track individual hornets and bees closely enough to show wing damage, stinger strikes, and the moment a raid turns from scouting to full assault. The temple setting gives the valley its name, but the film's real interest is in colony behavior: how each species organizes labor, communicates threat, and adapts as the balance of the fight shifts across the season.