Missing and death cases take place in succession along the Korean Demilitarized Zone. South Korea forms a unit led by Captain Jo Jin-Ho and First Lieutenant Shin Yoo-Hwa as assistant leader. They are given only 24 hours to find out the truth behind the incidents. Team members find evidence, but they feel like something isn't right.
North Hamgyong Province is the northernmost province of North Korea. The province was formed in 1896 from the northern half of the former Hamgyong Province.