Tae Guk Gi: The Brotherhood of War

Jin-tae (Jang Dong-gun) has always looked out for his little brother, Jin-seok (Won-bin), even shining shoes to raise funds for his college education. When the Korean War flares up and both brothers are drafted, Jin-tae decides he has to protect his younger sibling. Jin-tae makes a bargain with his commander: He'll take the riskiest missions if it will help shield Jin-seok from battle. In time, Jin-tae becomes a war hero -- with a growing blood lust that shocks his younger brother.