Vikings Versus Nazis

In a dilapidated chateau on the Normandy coast, a group of Waffen-SS soldiers force the brilliant Jewish physicist Professor Rosenbrücke to conduct dangerous experiments into time travel... Hoping to use Rosenbrücke's temporal manipulator to loot the past of its treasures in order to fund the German war effort, Obergruppenführer Krebs is shocked and horrified when an initial test run brings back not gold and jewels, but a horde of marauding Vikings... The Viking leader, Ingunn the Red, initially deems this to be a raid like any other. But after some of her men are slaughtered and she is taken prisoner, she sees things differently. And now she has two objectives: to avenge herself upon Krebs and his SS, and to find some way to return her Vikings to the past from which they came. And there's a third group on the scene: Simone Chabeau and her French Resistance cell who have been given the task of rescuing Professor Rosenbrücke and his machine. How can they hope to storm Chateau Joiry and free Rosenbrücke? It all seems hopeless until they meet the Vikings...