A new breed of aggressive, ravenous sharks cracks the frozen ocean floor of an Arctic research station, devouring all who fall through. As the station sinks into frigid waters, those alive must fashion makeshift weapons or suffer the same fate.

When terrorists plant a bomb on a commercial flight, the passengers aboard the plane must fight to keep the plane in the air and all the passengers alive: the bomb is rigged to detonate whenever the plane dips below 800 feet.