Cape Chelyuskin. Arctic Observatory. Movement of ships, including the Krasin icebreaker, along the Northern Sea Route. Tiksi seaport. Loading and unloading works. Providence Bay. Reindeer team movement. Helicopters and planes in the air. Lena river. Lena Pillars. Taiga landscapes. Geological expeditions in the field. Expedition camp. Schoolchildren at the boarding school in the classroom. Settlement Bogoron, Kyusyur. Lake Baikal. Landscapes. Movement of ships. Fishing boat in the lake. Fishermen are pulling the net. Masek. Residents of coastal settlements. Deposits of iron ore, coal, phlogonite, gold in Yakutia. Industrial extraction of minerals. Chulman village. The city of Aldan. Geological expedition on the Indigirka river. Members of the film crew at work.