Lee Dong-Jin (Jin Young) is recognized as the best in the field of data mining. The reason he majored in statistics at his university was because of Park Mi-Jung (Roh Jeong-Eui) and his wish to help her. Lee Dong-Jin and Park Mi-Jung attended the same high school and he had crush on her, but she was called a witch. Since Park Mi-Jung was little, strange things occurred around her like all the guys who liked her died or got injured. 10 years after school graduation, Lee Dong-Jin happens to meet Park Mi-Jung again. She has now cut herself off from the world, believing her fate is cursed, but she wants to go out into the world. In hopes of Park Mi-Jung breaking out of her shell, Lee Dong-Jin wants to prove that all these unfortunate incidents are not because of her. To prove his thesis, he investigates all the situations when guys around her got hurt. Risking his life, he finally finds the law of misfortune around her.