A story of a teenage girl whose father is a mafia. As the only heir and blood related of his father the girl is entrusted with all the power and wealth after the death of his father who is the second most terrifying mafia of the city Seol. The girl takes this as an advantage to take revenge for the common people who died and suffer from people like his father with the wealth and power given to her. She goes into a dangerous path in life where she can't ensure her safety so she chooses to spy on the her enemy, the most famous mafia named Yoo Kyungwan.