Red Box

Imagine that you found a red box with your name on it at your doorstep. Would you want to open it? On the day of the police exam, Choi Doik receives such a box. Inside, he finds only a black note with a mysterious message: "Under no circumstances speak to the man in the black suit." The contents of the note alarm Doik, but he goes to the exam anyway. And… he meets a stranger in a black suit who asks him for directions. A couple of minutes later, before Doik's eyes, the stranger jumps off the roof of a high-rise building, killing himself and a passing girl. Doik is not the only one who received the red box. Gradually, he meets other people who received the same thing. And each contained a note with a phrase that seemed meaningless at first glance, which soon gained meaning…