Isak Borg is the first secretary of Swedish Embassy in Pyongyang. Even though he's a diplomat, he is secretly dating Bok-joo, a local traffic officer. One day, after a shady man was seen at their secret meeting spot, Bok-joo goes missing. With his departure date approaching, Borg searches for Bok-joo and begins to get suspicious of his interpreter, Lee Myeong-jun.

In their late twenties, Jaehee and Jungwoo are co-workers at a video production company. While working on a project related to caregiving, they meet Ahyeon, Jaehee's neighbor. Meeting Ahyeon awakens a part of Jaehee's heart and memories.