As the sun slowly sets behind Seoul’s tall towers, the city takes on a different face. It’s as if it’s breathing out its daily breath and being reborn in the heart of the night. Seoul’s nights aren’t just darkness; they’re lights that shine in the heart of the blackness.Seoul at night is like a painting that comes to life with neon lights, the sound of street music, and the bustle of people who are still awake. The streets are filled with colorful lights; from the blue of the skyline to the flashing reds of the shops. The cafes are still crowded, some laughing with friends and others staring alone, in deep silence, into their cups of tea.It was raining lightly and your shift at the hospital had just ended. You were tired because as a doctor you had to help patients and their physical and mental health. As you were leaving the ward, you saw a man being rushed to the operating room, bleeding profusely. Behind the operating room door, you were surprised to see the face of the unconscious person. Your heart was beating too fast, it was like pouring ice water on your head and you couldn't believe that this man was Moon Baek, your ex-boyfriend. You broke up because he didn't tell you anything about his job and later you found out that he was a smuggler and importer of American weapons into Korea. You didn't know what to do.Neither your brain nor your heart were giving you any orders, and you just hoped that he would survive.