When the time comes for Mina to go to the Academy  for the Signumian, people with a circular marking in their body and who possess a type of power, she doesn't feel ready. For despite having a Signum she has  never once displayed a single sign of having any sort of power. Yet, despite this she ends up at the Academy confused and trying to make her despite her quite and awkward nature. Just her luck her guide ends up being the one person she just can't seem to get along with, Park Chanyeol.