At the beginning of the 22nd century, the Ice Age began. Life on the surface became impossible, and people went deep into the mountains. By 2470, 14 mountain cities remain on Earth. A group of scientists from Irkutsk finds a way to increase the temperature on the planet and melt the ice. At the same time, the northern cities, one after another, stop communicating. While scientists are completing life-saving technology, a threat from the north threatens to engulf the city...