A war in a tropical nation, a jungle war. The Korean army was dispatched to this war,and many soldiers killed and were killed in the fighting. As time went by, the long war began to show its end. Most of the soldiers returned to their homeland and adapted to society, but some were different. The soldiers who had become broken, adapted to the slaughter, could not live mixed in with society. They gathered in a large, Kowloon Walled City-like building on the outskirts of the city and lived relying on each other. Right after the war ended. The monster of the jungle war. Sergeant Kim of the 1st Platoon, White Tiger Battalion. For some reason, he gathered his platoon members and stormed the house of Captain Seo, who had been his company commander. After breaking down the door and a fierce battle with Captain Seo, Sergeant Kim killed the captain. However, Captain Seo's son was hiding in a closet and could only watch as his father was killed. Twenty years have passed since then. Sergeant Kim reigned over the broken soldiers in the Kowloon Walled City. His platoon members, who were also skilled soldiers, each held a position as an officer. A world without war was boring and empty for them. And one day, Captain Seo's son from the closet came to find them. His goal was clear. To kill everyone who had killed his father that day, and Sergeant Kim.