Mark's dad borrowed a lot of money from a company that actually is a opened by a gangster gang and after Mark's dad committed suicide he needed to take care of the dept. One day some man came and dragged Mark with them, the leader had a gun shifted at him to make him return the money, but Mark didn’t have any. The son of the leader or the boss of the company came and stopped them from hurting Mark. He saved Mark and Mark needed to work as a slave for him until he return all the money. What will happened when Mark slowly fell in love with the gangster's son, the son of who made his father committed suicide and the one almost killed him? The son of the gangster, the one who saved Mark, the one Mark fell in love with, named Park Jinyoung........