In this pulse-pounding action-thriller global warming triggers the onset of a new Ice Age. As tornadoes flatten Los Angeles a tidal wave engulfs New York City and the entire Northern Hemisphere begins to freeze solid. Now climatologist Jack Hall (Dennis Quaid) his son Sam (Jake Gyllenhaal) and a small band of survivors must ride out the growing superstorm and stay alive in the face of an enemy more powerful and relentless than any they've ever encountered: Mother Nature!