A film about the first Soviet Antarctic wintering site of the Mirny South Polar Observatory. Landscapes of Antarctica. Blizzard. The settlement of Mirny. The houses of the village, covered with snow. People leave houses through roof hatches; fix the helicopters on the ice in a frost of -67.6 degrees. A tractor-sledge train is moving deep into Antarctica. Creation of the polar station "Pionerskaya" in Oasis. Winterers during work: meteorologists, forecasters record instrument readings; aerologists launch a probe; geomorphologists, glaciologists investigate the thickness of the ice; radiophysics at the instruments. The expedition was headed by the Hero of the Soviet Union M. M. Somov, among the members of the expedition were professor A. Gusev, L. Dolgushin, pilot I. I. Cherevichny and others. Demonstration of polar explorers in Mirny, dedicated to the holiday on November 7. Spring in Antarctica. Penguins with chicks. Meeting of the Ob ship with the new crew of polar explorers. Opening of the monument to the Komsomol I. Khmara, who died in the first days of the expedition. Members of the first South Polar expedition on the "Ob" ship leave Antarctica.