Sinb is a daughter of a mafia boss. but, she didn't know her father's activities. not until her father died. When her father died, the organization of her father passed to her. And as she grows, she is still finding justice for her father's death. In her high school days, she always get bullied for being fat and has messy appearance, then there's this girl who saves her from drowning her own thoughts. what will gonna happen if the shy girl will be the mafia boss and take revenge to the people who bullied her and especially, to the people who killed her father?