Winter, 1944. Allied forces have liberated most of Axis-occupied Italy - with one crucial exception: the Nazi headquarters north of the Gothic Line. Heavily guarded and surrounded by rugged terrain, the mountain fortress is nearly impenetrable. The Allied's plan: drop two paratroopers into the mountains - and take the fortress by storm. Ultimately, the mission that began in broad daylight, in the enemy's line of fire, would end one of the darkest chapters in history.