The seekers, there's so many ... I can't do it anymore...

Oh, Reinne, the Mother Nature, I beg for your forgiveness. I cannot carry these sins anymore. Let your spirits take my soul and let me live in Mzeismia. And for my child... My only child, Krystal, she deserves to live and continues her life. I, Katrina ends my duty as a holder.

Krystal is a 13^th years old girl who lost her parents. She believes that they were murdered. Krystal now is hated by everyone else except Sulli. Sulli, she had a big sin in the past along with Yuri, Sunny, and Sooyoung. Krystal is hated but she is loved by someone she likes, Minho. Is it really love ? Why would a handsome guy like her even though she has nothing now ?

As she faces new and hard problems as an orphan, she discovers her mom's secret through her mom's diary and an old strange book. Were they murdered or did they suicide ? What is the secret behind her mom's death ? Who is her mom ?

But the thing is, what is Krystal ?