Mark Tuan l 24

Mark Tuan is the only son of China's baddest mafia leader. As to him being the only son, he is expected to follow his father's footstep. He is skilled in martial arts and gun shooting. He is very smart and is always alarmed of his surroundings. He always think twice and have never made a mistake. Or at least for now he hasn't. If there was one person who can live up to the name China's baddest mafia leader, it would be Mark Tuan. 

Kim Soojung l 21

Kim Soojung is a college drop-out who is trying to survive through part-time jobs. She supports herself and her gamble addict step-dad. It so happens her step-dad is in debt with the casino Mark owns.