3 days before the armistice, South Korean soldier, 'Nam-bok (SEOL Kyung-gu)' is given orders to deliver a top secret document to a set place and time.However, he ends up losing all his fellow soldiers and the document to a sudden enemy attack. North Korean soldier with just book knowledge of tanks, 'Young-gwang (YEO Jin-goo)' becomes the sole survivor of air bombings while advancing south.Struggling to go back north with the tank, he finds Nam-bok's secret document by chance, and they come face to face at the Western Front.