A cursed survivor of killings at the Amityville House brings evil to a small island where bizarre genetic experiments are carried out on humans and animals in a secret women's prison.

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.