You look like an ordinary, cool, and pretty teenager girl on the outside. But the moment you're out of school, you have a mission: to track down people with potential power, or even a mutant, like yourself, and fight those who turned to the Dark Side. You grew up with a boy named Do Kyungsoo. In fact, he has a certain power himself, but little did they know it would come to serve a purpose. However, you two have to separate when you move to America. But after 5 years, secrets are revealed and things that shouldn't be known become known..