冷战时期，一批任务失败的北韩间谍被南韩政府囚禁，身陷囹圄超过30年后，终因两韩关系改善而被释放。 南朝鲜独立电影的领军人物金东园于1992年摄制的纪录片《送还》，是一部讲述北朝鲜人到南方进行情报搜集活动的影片，同时也反映了上世纪40、50年代南朝鲜的监狱状况，以及南朝鲜到北方的探亲活动。该影片在南朝鲜长时间被列入禁片。

In 1992, political prisoners from North Korea settled in the South Korean town where filmmaker Dong-won Kim lived. Sent to South Korea as spies during the war, they spent 30 years in jail. How did they endure the many years of torture? What will become of them now that they have been released? Twelve years in the making, Repatriation is a very personal view of a country divided by an ongoing cold war.