There’s no one knows – not even himself – about Wonho’s real identity until he met his friends (Hyunwoo, Minhyuk, Kihyun, Hyungwon, Jooheon, and Changkyun). He hated

Green Hill Academy is a school for troubled teens, err... sorry! it's a school for peculiar teens - teens with special gifts or known as supernatural (or what ever you usually call for that such weird things) -,  located in a hill which far from residential areas.

After waiting for almost 2 years, Hakyeon finally had an opportunity to handle that case, assisted by his four team members and a forensic doctor. But this is not as easy as imagined. There are some victims, but there is no evidence and suspect.