With the Germans apparently near defeat in the latter part of World War II, a squad of American soldiers from the 2nd Infantry Division on a routine mission near Elsenborn in the Belgian Ardennes encounter a surprisingly strong German tank destroyer and infantry force. After a fierce firefight, the Americans escape and try to make their way back to their own lines to report the German surge. En route, they stumble across a German experimental site, still smoldering with flames from some devastating event. Surprisingly, this site is in Heidenfeld, Thuringia in Germany, although their own lines are hundreds of kilometers away in Belgium.