该剧为爱情剧，改编自小说《夜旅人》。以1937年与2015年为双时空背景，讲述了民国律师与现代法医因699号公寓的时空交汇相遇，并在动荡时代与家族阴谋中携手破解谜团的故事。

城市青年想享受绿色浪漫，就到乡村去吧！
前往宁静的乡村会馆，帮忙干活，展示才艺，成为老人家小狗孙子的节目。

In South Korea, military service is mandatory for all men. But a select few—like privileged medical students—can serve as public health doctors instead. This is the story of those privileged few. Do Ji-ui, a plastic surgeon, is assigned to Pyeondong-do, an isolated island no one wants to go to. From the very first day, ominous signs begin to appear. Can he survive a full year on this hellish island and make it out alive—or will the island break him before he can hold the line?