Unfinished Business

Around thirty years ago, in a date no one wants to remember. A girl, along with three other friends, died when they drowned in their swimming vacation few days before their graduation. It was a painful loss, but all thought after it, they can just forget it, but they are wrong. After all those years, she's back, roaming around the school she wasn't able to graduate into, and for the fear it will scare other incoming students away, the teachers hired Liora, an honor student who once dealt with supernatural beings. But the problem is that, she didn't know anything about ghosts, and in her first attempt to investigate about the case with her friend Zunyan... a series of incidents occurred which only made the case more confusing as it is.