Kim Minjae, daughter of Kim Jae-beom a.k.a. the "Mafia Boss". A girl who is already independent at a young age and is willing to change and take revenge for her Mother's death. Jeon Jungkook, son of Jeon Jung-hoon who rules the most popular and successful mafia group. What will happen if Minjae found out the truth behind her Mother's death?