A film about the life of ants in the conditions of the "Upper Klyazma" reserve, where the conditions of their habitation are created and studied. Moscow region, Solnechnogorsk district. Landscapes of the territory of the reserve. Overgrown reservoir. A rowan branch illuminated by a sunbeam. The spider weaves a web. Ants and bees on flowering plants. Flowers are blooming. Deer in the forest thickets. The capercaillie takes off. A herd of wild boars in the woods, the ground dug by wild boars. The fox is running. The car drives through the territory of the reserve.