Eastern Europe, 1944. The Allies successfully bomb a dam in France, wiping out a German installation, concealing secret codes valuable for Allied decoding. A rogue band of soldiers is sent to retrieve the codes from a hidden vault in the flooded towns ruins and bring them back to the Allied headquarters. Along the way they must fight off pockets of Nazi resistance and stay alive.

A scientist creates a toxic cocktail that slowly leaks into the local population, creating flesh-eating zombies - and only one creature of legend can stop the growing hordes of the undead.