Peril in the North Ships begin to mysteriously vanish from the North Sea, especially Allied ships. Even with Subs in the area for a fast response, ships continue to sink, destroyed from above. Hardluck Hannigan and his merry band are sent to investigate and discover that the Nazis are once again using the flying discs that Hannigan first encountered during the Sky-Masters affair! Hannigan is very aware of the devastating capabilities of these flying saucers and launches an expedition to the Arctic to locate and destroy the Nazi's Arctic Snowbase One once and for all...