Directed by Park Chan-wook, Joint Security Area (JSA) (2000) is a South Korean mystery drama set within the heavily guarded Korean Demilitarized Zone. Starring Lee Byung-hun and Song Kang-ho, the film follows the investigation of a deadly border incident involving North and South Korean soldiers. Combining political tension with psychological drama and mystery elements, the film explores friendship, division and the human consequences of political conflict. It became one of the breakthrough international successes of modern Korean cinema.

Arrow Films

Before Oldboy, before The Handmaiden, visionary filmmaker Park Chan-wook helmed this gripping tale of deceit, misunderstanding and the senselessness of war.

Gunfire breaks out in the demilitarised zone between North and South Korea, leaving two North Korean soldiers dead while a wounded South Korean soldier (Lee Byung-hun, The Good, the Bad, the Weird) flees to safety. With the tenuous peace between the two warring nations on a knife-edge, a neutral team of investigators, headed by Swiss Army Major Sophie Jean (Lee Young-ae, Lady Vengeance), is dispatched to question both sides to determine what really happened under cover of darkness out in no-man's land.

The recipient of multiple accolades, including Best Film at South Korea's 2001 Grand Bell Awards, JSA – Joint Security Area showcases Park's iconic style in an embryonic form, and demonstrates that humanity and common purpose can be found in the most unlikely places.

Från IMDB:
After a shooting incident at the North-South Korean border DMZ leaves two North Korean soldiers dead, a neutral Swiss and Swedish team investigates what actually happened.