you're a assassin a deadly assassin of the city, named Dark Moon because you're always hidden in the dark of the shadows you're planning to take down park's evil organization and revenge from your mother's death

one cold night you're targeting some members of the organization, you go to a cabin where the one member live, when you're about to attack the sleeping guy you heard someone behind you, you quickly look who it is

meanwhile heeseung is a teenager who's your big fan he quickly hides at the corner, he's scared but also exited to meet you in person