Jeon Y/N, A sweet and kind hearted soul with an innocent mind, she loves everyone and always tries to make people around her happy... Unaware of the fact that the people around her had been keeping a big secret from her. Kim Taehyung, A man you wouldn't like to know, he has the world on his fingertip. He hates everyone and only uses them to get more powerful. He is cruel, ruthless and seems to have no heart. He has everything that a person desires, money, success, fame and most importantly he is feared by everyone, him the Mafia King had never bowed to anyone and is determined that the fact will remain the same. Is it possible for people with different personalities to fall in love? Will the Mafia King finally bow to someone out of love? Can an innocent person like y/n ever love the Mafia? No, right? Then what if she gets to know her brother might not be someone she thinks she knows.