Based on the true story that is known as the second battle of Yeonpyeong, this movie tells the story of some of the young soldiers who fought and died in the battle. The battle took place in the yellow sea on 29th of June in 2002, when two North-Korean vessels boarded the NLL - the Northern Limit Line - and fired at the South-Korean patrol boat named Chamsuri 357, killing six men and left 18 injured.—Anonymus