Zane Ziminski er videnskabsmand. Han er besat af tanken om, at vi ikke er alene i universet. Konstant scanner han luftvejene for at få beviser. Pludseligt sker det, han har ventet på så længe. Han opfanger et signal fra et andet solsystem. Nogen kommunikerer med jorden. Zane sporer signalerne til en øde radarstation i Yucatan Mexico. I sin søgen efter radarstationen finder Zane en gigantisk anlagt fabrik, der er gjort alt for at skjule midt i junglen. Da han sniger sig ind på fabrikken, får han sit livs chok.

INTER SCI climatologist Dr. David Kotzman has evidence that a shift in the Earth's polarity triggered the last Ice Age...in a single day. Now, it's happening again, and there's no time to escape. As the temperature plummets, Miami is blasted with snow and ice. Evacuation routes are jammed. The only chance David, his old flame Bryn, and a few other hopeful survivors have is to hole themselves up in a special chamber at INTER SCI. A desperate race for survival is ignited as nature's fury rages and the temperature plunges toward -459.67° F...ABSOLUTE ZERO!