Ha Yoon-ju becomes the newest member of a unit within the Korean Police Forces Special Crime Department that specializes in surveillance activities on high-profile criminals. She teams up with Hwang Sang-jun, the veteran leader of the unit, and tries to track down James who is the cold-hearted leader of an armed criminal organization.

Six years ago, the wife of a de facto marriage went missing in Hamyang after a bus accident. Her husband visits after hearing a tip that she has registered her marriage with another man. She is unable to remember the past. The man asks her current husband to visit Okcheon with her. She recalls a memory of where she lived with the man a long time ago.

Turkish Hotel: A man without a single testicle and a woman wearing an electronic anklet spend their first night on their honeymoon. Basic Class Jisoo: The story of a woman whose goal is to learn how to float and a swimming instructor who is too lazy to teach. I Have a Question: Two part-timers sit in the back alley during their break and chat. I Saw a Pebble: A man waiting for a woman in front of his house meets a little kid who appears to be the woman's younger sibling.

In 2025, South and North Korea unified. It was triggered by a sudden explosion in Midnight near the North of DMZ by a forest fire in December, 2024. The South Korean army unwittingly ended up helping to put out the fire. Such cooperation caused their unification. And 10 years later, A koreanAmerican Documentary Director Steven, working for USA tv-station NXN visits to korea. He is searching for information about the mysterical Green-light appeared in that forest fire in 2024. After some dangerous twists and turns, He found a huge secret of the DMZ fire and green light.