In the world, there are many types of people, but the most powerful among them was not money or work level, but rather the mafia. In the last five years, an unknown serial killer appeared. No one knew his destination, his identity, or even his gender, whether he was a man or a girl. But in the last year, rumors spread that were based on camera recordings of one of the mafia families that fell.

The unknown serial killer who killed several of the most powerful Mafia families alone, and it was a shock to everyone, was a young girl, they determined that from the shape of her body, as it became clear in the surveillance cameras that she appeared the last time she blew up an entire mansion after killing all the family members.. but her face was not clear.

One night, Jeon Jungkook sat in the middle of his mansion, working on his papers in his bedroom. He went to take a shower to relax, and when he came out, he sensed a strange aura somewhere in his room. Before he could turn around, a sharp knife blade was at his throat. This year, it was his turn to be eliminated by the unknown killer.

The chain deceived the girl, and she was not touched by a cat scratch during her missions, and it was known that no one was behind her, but she was alone... that rumor.