
Linden Shane, chief of Riverton Heating Station, prepares for an apocalyptic blizzard. When extreme cold of minus 72 degrees Celsius engulfs the city and the power grid collapses, he guards the only heat source. He protects his family, rescues neighbors, unites with a rescue team to establish a temporary heating station, and fends off thugs. He leads survivors until rescue arrives and participates in the city's reconstruction.