Park Jimin is a well known Mafia boss. He and his gang, Bangtan are strong and feared Mafias in seoul. Their, more specifically His power is worldwide known. Merie is a girl, grown in a orphange being aware of the existence of her family. One day, as they all chilling wirh his gang, Seokjin saw a girl really late at night. He then noticed a necklace, that he was quite sure he had the same and the journey started. As Seokjin finds out, Merie is his sister and she enters his life, Park Jimin and Merie meet each other and the drama starts.