Bella is a professional assassin and mafia boss. She is 15 years old. Cold. Dangerous. She wants revenge on her father. She is Jeongin's sister. Beautiful. Strong. Jeongin, head of the largest mafia companies Dangerous, cold and unmerciful. He doesn't remember that he has a sister because their father threw her when she was young in the street, and now she has grown up and become their father's enemy, and she does not know her brother. He is Bella's brother. He gets very angry. Cruel. Wooyoung is a perverted and arrogant girl. Jeongin's wife. Arrogant. Cruel. Kind to Jeongin. Lee Dong Wook is the father of Bella and Jeongin. The biggest boss of the mafia. He lied to his son and told him that Bella was a bad girl who killed your grandfather. Sana is the mother of Jeongin and Bella. Beautiful. Kind. Gorgeous. Sweet. Strong. In the past. Their father hated Bella. He threw her in the street when she was young. The enemy smiled because he had a weakness for the president. He took Bella and raised her until she was fifteen years old. She learned to fight and became the head of a powerful mafia. Bella and the mafia men attacked Jeongin's house. They killed the guards. The men grabbed Jeongin, the father, and the mother. Bella smiled maliciously.