In 1965, Marine Sergeant Kim Jin-woo returns to his hometown. When his lover, who promised him a future, leaves him, he is deployed to Vietnam. However, he loses everything due to the war and returns once more. Meanwhile, Sergeant Jeong Jong-heon, whose role was changed to an intelligence operative of the White Horse Division during the Vietnam War. He intentionally approaches a Vietnamese woman named 'Huong' to end the war... Remember the tears of heroes that continue to this day.