대동강 출신

After liberation, Seong-jun, who escaped to South Korea, earns a living by serving as a Jiget-gun. It is a time when the two Koreas split and the ideological confrontation intensified, but Sung-jun refuses to be caught up in any ideology. However, when he encounters the atrocities and conspiracies of the communists, the Jeonpyeong Action Group, his beliefs change. He joins the Northwest Youth Corps with his comrades to crush the communist conspiracy.