While vacationing in Alaska, scientist Roger Summers stumbles upon frozen animals in the woods. Confused, Roger asks a reclusive environmentalist whose warnings of severe global freezing were rebuffed by the scientific community to come out of retirement. Together, they realize that a freezing storm is gaining strength and will soon cover the entire planet. With people freezing to death after being outside for only four minutes, it's up to Roger to save his family, the community, and the world.