Lake in the crater of the Ebeko volcano. Landscape with volcanoes. Volcanologists take a gas sample. The city of Petropavlovsk. Doctor of Sciences SI Naboko is walking along the street. Looks at books at the kiosk. Volcanic station. SI Naboko, her son Igor and his wife in the laboratory. Scientists climb Ebeko, take samples of sulfur and gas. Smoking fumaroles are volcanic gas outlets. Volcanologists at work (synchronously). Scientists in a rubber boat float on a volcanic lake. Photos of the eruption of Klyuchevskoy volcano. SI Naboko in a helicopter cockpit flies into the valley of geysers. The landscape of the valley of geysers. Scientists at the vulcanizing geyser: take pictures, take a sample of water. Men swim in thermal waters. Greenhouse with cucumbers grown in winter in Kamchatka. The city of Petropavlovsk. At the port, people greeted by the ship. Volcanologists with backpacks near the institute. Scientists climb Klyuchevskaya Sopka. They are standing on a snowy summit.