Lee Know is an assassin. You are a young girl going to college. One day, as a result of an agreement, Lee Know agrees to kill you in exchange for money. This is his profession, he kills people in return for the deal and gets the money, that's why he is one of the richest people in Korea. Mysterious and cold. He has no close relationship with anyone until now.

You go home from school around 7pm and you feel like someone is following you.