Yura, who lost her mother at a young age, lives a happy life with her father, who runs a subcontracting company, and her brother, a young professional boxer, despite not being wealthy. One day, she receives a call that her brother has started a fight with some local delinquents. Unreasonably embroiled in a fight, her brother resorts to violence. Her father and Yura rush to the delinquent's hangout, but the delinquents threaten them, saying, "If you care about your brother's future as a professional boxer, you have to pay the settlement money right now. If you don't, we'll make it public!" Yura's father quickly leaves the scene to raise the settlement money, but Yura is left behind as a hostage...