Intro. She, with just 20 years, loads on her shoulders a weight that no one so young should endure. Since his mother died and his father disappeared, he takes care of his six -year -old brother, Jisoo, a cheerful, curious child, who knows nothing about the darkness that surrounds them. They live in a small apartment in the suburbs, surviving with temporary jobs, unpaid invoices and constant fear.
One day, his father - adapt to the game and debts - reappears just to ruin everything. It owes a huge sum to one of the most dangerous men in the city: Min Yoongi, a millionaire businessman with a reputable to be implacable ... and who in the shadows leads a criminal network of traffic, power and secrets.
When the collectors are going to look for the father and discover that he has disappeared, they leave a message:
> "If your father does not pay, you will pay for him."
desperate, the young woman looks for an exit. But the only way to save his brother is to face Yoongi directly.