This story is about a girl named Kang Seulgi; a normal art major student who likes to dance and paint. She has a lovely personality and a pretty face every boys at school likes. Everything's going normal for her; busy college schedule, evening part time job, and a guy bestfriend who she trusts. But suddenly it changes after about a week ago; right after her 20th birthday. Seulgi starts to see things she shouldn't have seen, she starts to feel like somebody's been following her around in this past few days and it begins to frightened her. And the most major change is; her hair color starts to fade and become more blonde from the tip of her hair. Her eye color begins to change; becoming more grey-ish blue. And one day she meets a guy who's not so different from the others. But the only thing is; no one can see him except for Seulgi. And what happens when he tells her that she's not a human like everyone; that she is actually a caster? What will happen when she's told that her life is in danger?