Bae Suzy is a student who's studies at one of the best boarding school in korea. One day, she decide to change school to one of the oldest and lame boarding school in korea. Her father, Bea Hoojin who's work as an building architect were against her decision but because of his daughter stubborness he have to agreed.

In her new school, suzy got to know her new roommates krystal, sulli and minah and then become bestfriends.

not only that suzy also get to know her classmate who she think as a mysterious girl name Lee Ji-eun.

As she turned at the new school, a lot of strange events that occur. Without her realizing everything that happens has to do with her. The question of what to do and the story goes on behind the mysterious events?