The newsreel consists of three plots. First part. First plot. The long night of the bats. Bulgaria, Orlova Chuka cave, researchers are studying bats - inhabitants of the cave. Types of cave, stalactites. A colony of sleeping bats on the ceiling. Cr.pl. - a bat stuck to the ceiling. Zoologists measure the body temperature of a mouse. Second plot. Flowers are traps. Insects adhered to the leaves and flowers of plants. The frog is caught in a flower trap. The cleaner beetle sits on a flower. Mosquito larvae living in flowers of the American Saracen grass. Scientists are studying the liquid collected on the leaves of a flower. The second part of. Third plot. Further only the pole. Franz Josef Land, ice floes, snow hummocks. Meteorologists are conducting research. A tractor transports the belongings of filmmakers who came to the island for underwater filming. Portable houses for winterers. Scuba divers are preparing to dive into the Barents Sea, descend into the ice-hole. Scuba divers with movie equipment swim underwater among the thickets of algae. The comb jelly is swimming. corals, starfish, sea anemones. Shrimp on a stone, sea spider.