In the Ural Mountains of Russia, transplanted Westerners Thom and Jock Cussler take tourists on adventurous snowmobile rides up and down the slopes. When an avalanche heads for their party, their quick thinking saves them all, but a village far below is buried completely. In nearby Kirovina, the brothers convince townsfolk to hid in a mine to save themselves. Thom and Jock then risk their lives attempting to rescue survivors trapped under a mountainside nightclub. They must act fast - the air is running out!