In glacial Antarctica, the earth's frozen crust is breached by a spewing volcanic plume. The fissure grows until the Ross Ice Shelf floats free and drifts toward the warm Pacific; soon the melting glacier will flood every island and port. Predictably, the villainous Soviets launch a plot to carve out smaller icebergs and turn them into floating ports for world takeover. Waldo Rankin, ace Antarctic scientist, recruits son-in-law Josh to sound the alarm via his New York Times network. Daughter Melissa and her counterpart glaciologist Anna in the USSR work separately to provide convincing data to show the potential catastrophe.