During World War II, a small group of American soldiers finds themselves stranded behind enemy lines in an Italian forest after an intense battle with German forces. Led by the tough and resourceful Sergeant Stone, the group includes Joey, a fresh-faced rookie; Mittens, a cynical but loyal trooper; and the bookish and curious Corporal Dolan. While evading Nazi patrols and trying to find their way back to Allied lines, they discover the wreckage of an alien spacecraft hidden in the woods. Inside, they find evidence of extraterrestrial beings and advanced technology, which they initially regard as a potential weapon against the Germans.

As they explore further, the soldiers are ambushed by Nazi troops who have also discovered the spacecraft and are keen on exploiting its secrets for their own purposes. A skirmish ensues, causing several unexpected events to unfold and leading the soldiers to form an uneasy alliance with one of the surviving aliens from the crashed ship. With both Nazis and otherworldly threats to contend with, the American troops must navigate a precarious path filled with danger and moral ambiguity, facing a challenge that tests their courage and loyalty in unimaginable ways. Here, their struggle for survival transcends ordinary warfare as they delve deeper into a conflict that spans beyond human comprehension.