A girl named Sherla Glaine was just living a boring and a simple life until she was attacked by a monster which is called "Kurin". According to her classmate, Jefferson, a Nin (hunter of Kurins) who just transferred to her school, she was hunted by that particular Kurin for she had lots of magical powers stored in the necklace that her late Mom gave her. So, Sherla suggested to just take off the necklace, but unfortunately, the powers were already transferred to her when she got scared. And so, Sherla Glaine decided to be a Nin just like Jefferson so that she can protect herself.