After the Third World War, Budes, the only victorious country, established a prisoner-of-war city where captured soldiers were held. The Budes Kingdom did not prevent other countries from bringing back their soldiers, but he had a condition. He would not voluntarily hand over the prisoners of war, and each country could take them away on their own.
In this way, in the past seven or eight years, countless troops and family members entered the gate of the Prisoner of War City to bring back their relatives and friends, but the gate was never pushed open from the inside. The activities of various countries to bring back captured soldiers slowly faded from people's sight.
Nanka, who finally grew up, and his companions embarked on the road to find their relatives. He discovered that this world was a world he had never set foot in before, a world that would scare him awake even in his dreams. Where will everything go in the end...