Arctic researchers discover a huge, frozen alien inside a crash-landed UFO, who emerges from icy captivity to terrorize humans.

A charter boat operator in the Caribbean breaks his policy of neutrality and takes a job transporting a resistance member to Martinique.

An American physicist is parachuted into war-torn Nazi Germany to obtain military secrets. But the deeper he probes, the deadlier his mission becomes, especially when his involvement with a beautiful and mysterious woman catapults him into an intense maelstrom of danger, betrayal, and murder.