An inspector from the Educational Rights Protection Bureau (ERPB) who is authorized by the government to use physical intervention and unconventional methods to discipline delinquent students and reform the educational system.

After being betrayed by love, Jisu believes that man-made garbage reveals the truth about them. One day, she comes across waste that’s been neatly sorted and discarded. It belongs to her next-door neighbor, Woojae. She grows curious about him and successfully approaches him using the information from his trash.

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.